CN115042487A - Corrosion-resistant structure - Google Patents
Corrosion-resistant structure Download PDFInfo
- Publication number
- CN115042487A CN115042487A CN202110258308.6A CN202110258308A CN115042487A CN 115042487 A CN115042487 A CN 115042487A CN 202110258308 A CN202110258308 A CN 202110258308A CN 115042487 A CN115042487 A CN 115042487A
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- corrosion
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Abstract
The invention provides an anti-corrosion structure. The corrosion-resistant structure of the present invention comprises: a mineral anticorrosive tape layer; a primer layer provided on one side of the petrolatum based corrosion protection tape layer; and the ultraviolet shielding layer is arranged on the opposite side of the petrolatum anti-corrosion belt layer from the base coat, the temperature-resistant flowing-down temperature of the petrolatum anti-corrosion belt layer is above 90 ℃, the peel strength of the petrolatum anti-corrosion belt layer is above 600N/m, the petrolatum anti-corrosion belt layer comprises a temperature-resistant upper material, the temperature-resistant upper material comprises organic bentonite and/or crystalline wax, and the temperature-resistant flowing-down temperature of the base coat is above 70 ℃. The anticorrosion structure of the invention can be used in outdoor environments, can have excellent anticorrosion performance even in high-temperature environments or places irradiated by direct sunlight, can effectively block ultraviolet rays, has long anticorrosion life, excellent coating performance and appearance, and also has excellent heat resistance, ultraviolet ray resistance and workability.
Description
Technical Field
The present invention relates to an anticorrosive structure, and more particularly to an anticorrosive structure having excellent corrosion resistance, high temperature resistance, coating properties, and appearance, and having a long anticorrosive life.
Background
The petrolatum anti-corrosion adhesive tape is widely used as an anti-corrosion product due to low price. At present, the petrolatum anticorrosion adhesive tape is mainly used for pipelines buried in oceans or underground. Although the mineral anticorrosive adhesive tape can achieve an anticorrosive effect on equipment buried in the sea or underground, the life span is greatly shortened when the mineral anticorrosive adhesive tape is used in an outdoor environment. For example, when the petrolatum based anticorrosive tape is used for marine or underground buried pipelines, the life span thereof may be 10 years or more, but when it is used in outdoor environments, the life span thereof is greatly shortened to about 3 years. One of the reasons for the shortened service life is that the petrolatum material is not resistant to ultraviolet rays, and the molecular chain of the petrolatum material is broken after being irradiated with light.
In addition, the petrolatum based anticorrosive adhesive tape has insufficient heat resistance, separation and dripping of oil (petrolatum) are likely to occur in an outdoor environment, the surface of the adhesive tape is sticky, the anticorrosive effect is deteriorated, and the anticorrosive life is shortened.
In order to solve the above problems, it has been reported that a coating material is applied to the outside of the anti-corrosive tape or a protective tape is used. However, when a coating material is applied to the outside of an anticorrosive tape or a protective tape is used, the coating material is difficult to apply due to precipitation and dripping of oil, or oil flows out from the weak portion of the coating material or the joint of the tape, resulting in poor appearance and affecting the service life of the outer coating layer.
Therefore, it is an important object to provide an anticorrosive material which does not cause oil leakage or oil dripping in an outdoor environment, has excellent heat resistance, anticorrosive property, coating property and appearance, and can exhibit anticorrosive performance for a long time.
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide an anticorrosive structure which can be used in an outdoor environment, has excellent anticorrosive properties, paintability, and appearance, has a long anticorrosive life, and is excellent in heat resistance, ultraviolet resistance, and workability.
Means for solving the problems
The present inventors have intensively studied to achieve the above object, and as a result, have found that the above object can be achieved by carrying out the following means.
Namely, the present invention is as follows.
[1] An anti-corrosion structure comprising:
a petrolatum based corrosion resistant tape layer;
a primer layer disposed on one side of the mineral-based corrosion protection tape layer; and
an ultraviolet shielding layer provided on a side of the petrolatum based anticorrosive tape layer opposite to the undercoat layer,
the temperature of the petrolatum anti-corrosion belt layer is over 90 ℃,
the peel strength of the mineral anti-corrosion belt layer is more than 600N/m,
the mineral anticorrosion strip layer comprises a temperature-resistant upper material A5,
the temperature-resistant upper material A5 comprises organic bentonite and/or crystalline wax,
the temperature of the bottom coating is over 70 ℃ under the temperature resistant flow.
[2] The anti-corrosion structure according to [1], wherein the petrolatum based anti-corrosion strip layer further comprises a base oil A1,
the content of the heat-resistant upper material A5 is 10 to 40 parts by mass relative to 100 parts by mass of the base oil A1.
[3] The anti-corrosion structure according to [1], wherein the petrolatum type anti-corrosion strip layer further comprises a base oil A1 and an inorganic filler A2,
the content of the inorganic filler A2 is 50 to 120 parts by mass with respect to 100 parts by mass of the base oil A1.
[4] The anti-corrosion structure according to [3], wherein the inorganic filler A2 contains at least one selected from the group consisting of talc, aluminum hydroxide and magnesium hydroxide.
[5] The corrosion-protected structure according to any one of [1] to [4], wherein the petrolatum-based anticorrosive tape layer has a flame retardant property.
[6] The corrosion-protected structure according to any one of [1] to [5], wherein the undercoat layer is formed from an undercoat composition,
the base coating composition comprises a mineral-based base coating composition or an oxidative polymerization-type base coating composition,
the mineral-based primer composition comprises a temperature-resistant upper material B5,
preferably, the temperature-resistant upper material B5 includes organic bentonite and/or crystalline wax.
[7] The anti-corrosion structure according to [6], wherein the petrolatum based primer composition further comprises a base oil B1,
the content of the temperature-resistant upper material B5 is 5-80 parts by mass relative to 100 parts by mass of the base oil B1.
[8] The corrosion-resistant structure according to any one of [1] to [7], wherein the ultraviolet-shielding layer has an ultraviolet transmittance of 1% or less.
[9] The corrosion-protected structure according to any one of [1] to [8], further comprising a corrosion-inhibiting mastic layer provided between the primer layer and the petrolatum-based corrosion-resistant band layer.
ADVANTAGEOUS EFFECTS OF INVENTION
The anticorrosive structure of the present invention can be used in outdoor environments, can have excellent anticorrosive performance even when used in high-temperature environments or places irradiated with direct sunlight, can effectively block ultraviolet rays, has a long anticorrosive life, is excellent in paintability and appearance, and is also excellent in heat resistance, ultraviolet resistance and workability. In addition, the anti-corrosion structure is suitable for coating and corrosion prevention of structures in any shapes, and has wide application prospect in outdoor environment.
Drawings
Fig. 1 is a sectional view schematically showing the structure of an anticorrosion structure according to an embodiment of the invention.
Fig. 2 is a sectional view schematically showing the structure of an anticorrosion structure according to another embodiment of the invention.
Description of the reference numerals
10 anticorrosive structure
1 base coat
2 petrolatum based anticorrosive tape layer
3 ultraviolet ray shielding layer
4 anticorrosive daub layer
Detailed Description
The present invention will be described in detail below. The technical features described below are explained based on typical embodiments and specific examples of the present invention, but the present invention is not limited to these embodiments and specific examples. It should be noted that:
in the present specification, the numerical range represented by "numerical value a to numerical value B" means a range including the end point numerical value A, B.
In the present specification, the numerical ranges indicated by "above" or "below" mean the numerical ranges including the numbers.
In the present specification, the term "may" includes both the case where a certain process is performed and the case where no process is performed.
As used herein, the term "optional" or "optional" is used to indicate that certain substances, components, performance steps, application conditions, and the like are used or not used.
In the specification, the unit names used are all international standard unit names.
In the present specification, the term "plurality" means two or more than two unless otherwise specified.
Reference in the specification to "some specific/preferred embodiments," "other specific/preferred embodiments," "an embodiment," or the like, means that a particular element (e.g., feature, structure, property, and/or characteristic) described in connection with the embodiment is included in at least one embodiment described herein, and may or may not be present in other embodiments. In addition, it is to be understood that the described elements may be combined in any suitable manner in the various embodiments.
< Corrosion-protected Structure >
The corrosion-resistant structure of the present invention comprises:
a mineral anticorrosive tape layer;
a primer layer disposed on one side of the mineral-based corrosion protection tape layer; and
an ultraviolet shielding layer provided on the opposite side of the petrolatum based anticorrosive tape layer from the undercoat layer,
the temperature of the petrolatum anti-corrosion belt layer is over 90 ℃,
the peel strength of the mineral anti-corrosion belt layer is more than 600N/m,
the mineral anti-corrosion belt layer comprises a temperature-resistant upper material A5,
the temperature-resistant upper material A5 comprises organic bentonite and/or crystalline wax,
the temperature of the bottom coating is over 70 ℃ under the temperature resistant flow.
Fig. 1 is a sectional view schematically showing the structure of an anticorrosion structure according to an embodiment of the invention. As shown in fig. 1, the anticorrosion structure 10 includes a primer layer 1, a petrolatum based anticorrosion band layer 2 provided on the primer layer 1, and an ultraviolet shielding layer 3 provided on the petrolatum based anticorrosion band layer 2.
Fig. 2 is a sectional view schematically showing the structure of an anticorrosive structure according to another embodiment of the present invention. As shown in fig. 2, the corrosion-resistant structure 10 includes a primer layer 1, a mineral anticorrosive mastic layer 4 provided on the primer layer 1, a mineral anticorrosive belt layer 2 provided on the mineral anticorrosive mastic layer 4, and an ultraviolet shielding layer 3 provided on the mineral anticorrosive belt layer 2.
[ petrolatum-based anticorrosive tape layer ]
The anticorrosive structure of the present embodiment is provided with the petrolatum based anticorrosive tape layer, and thus can block moisture and oxygen in the air, and the anticorrosive structure can exhibit excellent anticorrosive performance.
In some preferred embodiments, the petrolatum based corrosion protection tape layer is preferably formed as follows: the base material is immersed in the anticorrosive composition, and the base material is sufficiently impregnated with the anticorrosive composition and then cooled to room temperature to obtain the petrolatum anticorrosive tape layer.
The substrate is preferably a nonwoven fabric, and particularly preferably a polyester nonwoven fabric.
The nonwoven fabric is preferably: a nonwoven fabric called a web or the like is obtained by reinforcing a sheet body in which fibers are stacked in order to suppress the fibers from being entangled with each other with filaments having a higher tensile strength than the sheet body (hereinafter, also referred to as "reinforcing filaments").
Further, as the nonwoven fabric reinforced with the reinforcing yarn, a nonwoven fabric in which the reinforcing yarn is sewn into the sheet body so as to form a seam along the longitudinal direction, in other words, a nonwoven fabric reinforced with warp yarn is more preferable. By configuring the nonwoven fabric in this manner, the petrolatum based corrosion prevention band layer can be prevented from being elongated by the reinforcing wires when the petrolatum based corrosion prevention band layer is wound around, for example, a cylindrical metal member. As a result, the petrolatum based corrosion resistant band layer can be wound around the metal member in a state where a large tension is applied. Further, the shrinkage of the petrolatum based anticorrosive tape layer can be suppressed when the winding force is relaxed, and as a result, the workability of winding is good. More preferably, the reinforcing yarns are arranged in parallel at a predetermined interval in the width direction.
Further, as the nonwoven fabric reinforced with the reinforcing wires, a nonwoven fabric having a higher elongation against a constant stress in the longitudinal direction than in the width direction is preferable.
In addition, as the nonwoven fabric reinforced with the reinforcing yarn, a nonwoven fabric which is not reinforced in the width direction, in other words, a nonwoven fabric which is not reinforced with the weft yarn is preferable. When the petrolatum based corrosion prevention band layer is wound around a cylindrical metal member, for example, the width of the petrolatum based corrosion prevention band layer is narrowed, but if there are weft yarns, the weft yarns hinder the widthwise shrinkage of the petrolatum based corrosion prevention band layer, and curling is likely to occur in the petrolatum based corrosion prevention band layer, but if there are no weft yarns, curling is less likely to occur. Therefore, if no weft is present, the petrolatum based corrosion protection belt layer easily follows the shape of the metal member, and a gap is not easily generated between the petrolatum based corrosion protection belt layer formed on the metal member and the other layers. Therefore, from the viewpoint of improving the corrosion resistance, it is preferable that the nonwoven fabric is not reinforced with weft.
The mass per unit area of the base material is preferably 30 to 500g/m 2 More preferably 40 to 400g/m 2 More preferably 50 to 300g/m 2 . The mass per unit area of the base material of the petrolatum based anticorrosive tape layer of the present embodiment is 30g/m 2 This has the advantage that the texture is easily homogenized. Further, the mass per unit area of the base material of the petrolatum type anticorrosive tape layer of the present embodiment is 500g/m 2 As described below, the petrolatum based anticorrosive tape layer does not become excessively hard, and has an advantage of good handleability when the petrolatum based anticorrosive tape layer is wound around a construction site.
The amount of the anticorrosive composition impregnated in the base material of the mineral anticorrosive tape layer is preferably 300 to 5000g/m 2 More preferably 400 to 4000g/m 2 More preferably 500 to 3000g/m 2 . The amount of the corrosion-preventing composition impregnated in the base material of the mineral anticorrosive tape layer is 300g/m 2 This has the advantage that the corrosion resistance can be improved. The amount of the corrosion inhibiting composition impregnated into the base material in the petrolatum type corrosion inhibiting band layer was 5000g/m 2 The petrolatum based anticorrosive tape layer does not become excessively hard, and has an advantage of good handleability when wound around a construction site.
The "amount of the etching resist composition impregnated in the base material" means: the amount of the etching resist composition impregnated in the entire base material with respect to the area of one surface of the sheet-like base material.
As the anticorrosive composition, at least one selected from the group consisting of a base oil (a1), an inorganic filler (a2), a rust inhibitor (A3), a colorant (a4), and a temperature-resistant upper material (a5) is preferably included.
Examples of the base oil (a1) include: petrolatum.
Examples of the inorganic filler (a2) include: talc, aluminum hydroxide, silica, clay, calcium carbonate, mica, magnesium hydroxide, metal powder, and various inorganic fillers generally used in the art. As such an inorganic filler, conventionally known inorganic fillers can be used by a conventional method.
In some preferred embodiments, the content of the inorganic filler (a2) is 50 to 120 parts by mass with respect to 100 parts by mass of the base oil (a 1). The content of the inorganic filler (a2) is preferably 60 parts by mass or more from the viewpoint of improving the strength of the anticorrosive structure. The content of the inorganic filler (a2) is preferably 110 parts by mass or less, and more preferably 100 parts by mass or less, from the viewpoint of improving the adhesion of the anticorrosive structure.
Examples of the rust inhibitor (a3) include: inorganic rust inhibitors and organic rust inhibitors. These rust inhibitors may be used singly or in combination of two or more.
Examples of the inorganic rust inhibitor include chromate, nitrite, silicate, and polyphosphate.
Examples of the organic rust inhibitor include tannic acid, carboxylic acid (oleic acid, dimer acid, naphthenic acid, and the like), carboxylic acid metal soap (lanolin Ca, naphthenic acid Zn, wax oxide Ca, wax oxide Ba, and the like), sulfonate (Na sulfonate, Ca sulfonate, Ba sulfonate, and the like), amine salt, ester (ester obtained by reacting higher fatty acid with glycerin, sorbitan monoisostearyl ester, sorbitan monooleate, and the like), and the like.
The tannic acid is preferably tannic acid derived from gallnut.
In some preferred embodiments, the content of the rust inhibitor (A3) is 0.5 to 10 parts by mass, preferably 0.5 to 5 parts by mass, based on 100 parts by mass of the base oil (a 1). When the content of the rust inhibitor falls within the above range, the corrosion prevention performance of the corrosion-prevented structure can be further improved.
Examples of the colorant (a4) include: black lead, titanium dioxide, zinc oxide, graphite, carbon black, iron oxide, and the like. Among these, iron oxide is preferable. These colorants may be used alone or in combination of two or more.
In some preferred embodiments, the content of the colorant (a4) is 0.5 to 5 parts by mass, preferably 0.5 to 2 parts by mass, based on 100 parts by mass of the base oil (a 1).
Examples of the heat-resistant upper material (a5) include: organobentonite, crystalline wax, and the like. These temperature-resistant upper materials may be used singly or in combination of two or more.
Organobentonite is an inorganic mineral/organoammonium complex which can be made, for example, by: the bentonite is used as a raw material, and the bentonite is prepared by inserting an organic covering agent through an ion exchange technology by utilizing the lamellar structure of montmorillonite in the bentonite and the characteristic that the lamellar structure can be swelled and dispersed into colloidal clay in water or an organic solvent.
Commercially available organobentonite can be used. Commercially available products of organobentonite include, for example: BP-186C, and the like.
In the present invention, the organic bentonite is included, and the organic bentonite absorbs and swells in the base oil to form a gel, so that the organic bentonite has a capability of trapping or supporting oil components, thereby increasing the dropping point of the oil components and further improving the corrosion resistance.
As the crystalline wax, a wax in which a crystallization peak appears during temperature increase at a constant rate of 10 ℃/min using a Differential Scanning Calorimetry (DSC) apparatus is referred to. The crystalline wax is not limited to a single type of crystalline wax, but may be a combination of a plurality of types of waxes as long as the entire crystalline wax exhibits crystallinity.
In some preferred embodiments, the crystalline wax may include a fatty acid amide-based wax and a hydrocarbon-based wax (hydrocarbon wax). These may be used alone or in combination of 2 or more. Among these, fatty acid amide waxes are preferable from the viewpoint of effectively increasing the dropping point of the oil component, and fatty acid amide waxes having a melting point of 120 to 160 ℃ are more preferable.
Examples of the hydrocarbon-based wax (hydrocarbon wax) include: paraffin wax, microcrystalline wax, fischer-tropsch wax, polyethylene wax, oxidized polyethylene wax, polypropylene wax, oxidized polypropylene wax, and the like. Examples of commercially available products of the hydrocarbon-based wax include: polypropylene wax (PPW-0921) manufactured by Nanjing Tianshi corporation, and the like.
As the fatty acid amide-based wax, it may be a reaction product between a fatty acid and an amine. From the viewpoint of effectively increasing the dropping point of the oil component, a fatty acid amide wax having 17 to 50 carbon atoms is preferably used.
Examples of the fatty acid amide-based wax include: methylene bis lauric acid amide, methylene bis palmitic acid amide, methylene bis myristic acid amide, methylene bis stearic acid amide, methylene bis behenic acid amide, ethylene bis lauric acid amide, ethylene bis palmitic acid amide, ethylene bis myristic acid amide, ethylene bis stearic acid amide, or ethylene bis behenic acid amide.
The fatty acid amide wax may be synthesized by a conventionally known method or may be commercially available.
In the present invention, by including the crystalline wax, when the base oil is heated to a temperature not lower than the melting point and cooled slowly, it is possible to form a fine crystal in the base oil and form a stable three-dimensional network structure, and it is possible to exert an ability to hold an oil component, whereby the dropping point of the oil component can be increased and the corrosion resistance can be improved.
In some preferred embodiments, the melting point of the crystalline wax is preferably 120 ℃ or higher, more preferably 130 ℃ or higher, from the viewpoint of increasing the temperature resistant to the temperature under the stream. The melting point of the crystalline wax is preferably 160 ℃ or lower, more preferably 150 ℃ or lower, from the viewpoint of ease of processing.
In some preferred embodiments, the content of the temperature-resistant upper material (a5) is 10 to 40 parts by mass, preferably 12 to 35 parts by mass, based on 100 parts by mass of the base oil (a 1). When the content of the temperature-resistant upper material falls within the range, the dropping point of the oil can be increased, and the dropping of the oil can be effectively improved, so that the corrosion-resistant material has excellent corrosion resistance. Further, when the content of the heat resistant primer is within the above range, excellent adhesion can be obtained, and the heat resistant primer can be effectively attached to the surface of the adherend.
When the content of the heat resistant upper material is less than 10 parts by mass, insufficient heat resistance is likely to occur, and excellent heat resistance and adhesion are not likely to be compatible. When the content of the heat resistant upper material is more than 40 parts by mass, workability and adhesion are easily deteriorated, which is disadvantageous in industrial construction.
In some preferred embodiments, when the organobentonite is used alone, the amount of the organobentonite added is preferably 10 parts by mass or more per 100 parts by mass of the base oil from the viewpoint of improving the temperature resistance. The amount of the organobentonite added is preferably 25 parts by mass or less, more preferably 15 parts by mass or less, from the viewpoint of ease of application and winding.
In some preferred embodiments, when the crystalline wax is used alone, the amount of the crystalline wax added is preferably 10 parts by mass or more, more preferably 15 parts by mass or more, and still more preferably 20 parts by mass or more, relative to 100 parts by mass of the base oil, from the viewpoint of improving the temperature resistance. From the viewpoint of ease of application winding, the amount of the crystalline wax added is preferably 40 parts by mass or less, more preferably 35 parts by mass or less, and still more preferably 30 parts by mass or less.
In some preferred embodiments, when the organobentonite and the crystalline wax are used together, the amount of the organobentonite added is preferably 5 to 20 parts by mass, more preferably 5 to 15 parts by mass, and the amount of the crystalline wax added is preferably 5 to 20 parts by mass, relative to 100 parts by mass of the base oil, from the viewpoint of improving heat resistance and workability.
In addition to the above components, the anticorrosive composition may contain, as necessary, various additives that are generally used in the anticorrosive field, such as a surfactant, an antioxidant, and an antioxidant, within a range that does not impair the effects of the present invention. With respect to such various additives, conventionally known additives can be used by a conventional method.
In some preferred embodiments, the petrolatum based anti-corrosive tape layer is resistant to temperature of 90 ℃ or higher. From the viewpoint of more effectively suppressing the oil dripping effect, the temperature of the petrolatum corrosion-resistant strip layer is preferably 100 to 160 ℃, more preferably 110 to 150 ℃, and still more preferably 120 to 140 ℃. If the temperature of the mineral anticorrosive tape layer is less than 90 ℃ under temperature resistance, the heat resistance is poor, and the problems of oil separation and dripping are likely to occur, thereby causing deterioration of anticorrosive performance. The temperature of the petrolatum-based anticorrosive tape layer against the hot-flow was measured by the method described in the examples of the present specification.
In some preferred embodiments, the peel strength of the petrolatum based anti-corrosion strip layer is 600N/m or more. The peel strength of the petrolatum based anticorrosive band layer is preferably 800N/m or more from the viewpoint of improving the adhesion. The peel strength of the petrolatum based anticorrosive tape layer is preferably 2000N/m or less, more preferably 1800N/m or less, and still more preferably 1600N/m or less, from the viewpoint of ease of construction winding. In some preferred embodiments, the peel strength of the petrolatum based anti-corrosion strip layer is preferably 800 to 1600N/m.
If the peel strength of the mineral anticorrosive tape layer is less than 600N/m, the adhesion is poor, and the anticorrosive structure is easily detached from the adherend, which causes a problem of difficulty in construction. If the peel strength of the mineral anti-corrosion belt layer is more than 2000N/m, the construction winding difficulty is easily increased, and the construction is not facilitated. The peel strength of the mineral corrosion tape layer is measured in appendix H GB/T32119-2015.
In some preferred embodiments, the thickness of the petrolatum based anti-corrosion strip layer is preferably 0.5 to 4mm, and more preferably 0.9 to 2.5 mm. When the thickness of the petrolatum based anticorrosive tape layer is within the above range, there is an advantage that the anticorrosive and anticorrosive properties can be improved, and there is an advantage that the generation of floating of the petrolatum based anticorrosive tape layer during winding can be suppressed.
[ undercoat layer ]
The primer layer 1 is formed on the side closer to the object to be coated (for example, a metal member) than the aforementioned mineral anticorrosive tape layer 2, and is in contact with the surface of the object to be coated (for example, a metal member). The anticorrosive structure has the advantage that it is easily adhered to an object to be coated (e.g., a metal member) and has excellent anticorrosive performance by providing the primer layer, and can have excellent anticorrosive performance even when used in an outdoor environment.
In the present invention, the temperature of the undercoat layer is 70 ℃ or higher. When the undercoat layer is a petrolatum-based undercoat layer, the undercoat layer preferably has a temperature resistant flow temperature of 80 ℃ or higher from the viewpoint of the effect of suppressing oil dripping in a high-temperature environment. The temperature of the undercoat layer against the hot-flow is preferably 110 ℃ or lower, and more preferably 90 ℃ or lower, from the viewpoint of ease of processing. If the temperature of the undercoat layer is less than 70 ℃ under high temperature, the heat resistance is poor, and the problems of oil separation and dripping are likely to occur, thereby deteriorating the corrosion resistance. The temperature of the undercoat layer under a hot flow is measured by the method described in examples of the present specification.
In some preferred embodiments, the undercoat layer may be formed by coating the surface of the adherend (e.g., a metal member) with an undercoat composition. That is, the undercoat layer may be formed from an undercoat composition.
As the undercoat composition, any appropriate undercoat composition can be used as long as it has the above-described temperature resistant streaming-down temperature.
In some preferred embodiments, the basecoating composition comprises a petrolatum basecoating composition or an oxidative polymerization basecoating composition.
(petrolatum type undercoating composition)
In some preferred embodiments, the petrolatum based primer composition preferably includes at least one selected from the group consisting of a base oil (B1), a rust inhibitor (B2), a reinforcing filler (B3), a softening agent (B4), and a temperature-resistant filler (B5). Preferably, the petrolatum-based primer composition includes a temperature resistant primer (B5).
Examples of the base oil (B1) include: petrolatum, oxidized petrolatum, and the like. These base oils may be used singly or in combination of two or more.
Examples of the rust inhibitor (B2) include inorganic rust inhibitors and organic rust inhibitors. These rust inhibitors may be used singly or in combination of two or more.
Examples of the inorganic rust inhibitor include chromate, nitrite, silicate, phosphate, and polyphosphate.
Examples of the organic rust inhibitor include tannic acid, carboxylic acid (oleic acid, dimer acid, naphthenic acid, and the like), carboxylic acid metal soap (lanolin Ca, naphthenic acid Zn, wax oxide Ca, wax oxide Ba, and the like), sulfonate (Na sulfonate, Ca sulfonate, Ba sulfonate, and the like), amine salt, ester (ester obtained by reacting higher fatty acid with glycerin, sorbitan monoisostearyl ester, sorbitan monooleate, and the like), and the like.
The tannic acid is preferably tannic acid derived from galla chinensis.
In some preferred embodiments, the content of the rust inhibitor (B2) is preferably 5 to 40 parts by mass, and more preferably 5 to 20 parts by mass, based on 100 parts by mass of the base oil (B1). When the content of the rust inhibitor falls within the above range, the corrosion prevention performance of the corrosion-prevented structure can be further improved.
Examples of the reinforcing filler (B3) include: talc or talc particles, mineral mica, silica, clay, calcium carbonate, micaceous iron oxide, aluminum hydroxide, magnesium hydroxide, and the like. These reinforcing fillers may be used singly or in combination of two or more.
Of the reinforcing fillers mentioned above, talc particles and mineral mica are more preferable because they have an excellent effect of reinforcing the undercoating composition and are more effective in imparting shape retention to the undercoating composition.
In some preferred embodiments, the talc or talc particles, mineral mica are preferably included in the under-coating composition in a proportion of 90 mass% or more, preferably 95 mass% or more, more preferably 100 mass% in the reinforcing filler.
From the viewpoint of excellent workability, the median diameter of the talc particles determined by a laser diffraction particle size distribution measuring apparatus is preferably 1 μm or more and 100 μm or less, more preferably 1 μm or more and 50 μm or less, and still more preferably 10 μm or more and 40 μm or less.
As the talc particles, those passing through a sieve (1 mass% or less of the remainder of the sieve) in an amount of 99 mass% or more when they are sieved with a 75 μm sieve are preferable.
In some preferred embodiments, the content of the reinforcing filler (B3) is preferably 30 to 80 parts by mass, and more preferably 40 to 70 parts by mass, relative to 100 parts by mass of the base oil (B1). When the content of the reinforcing filler falls within the above range, the strength of the anticorrosion structure can be further improved.
Examples of the softener (B4) include organic compounds having a lower molecular weight than the base oil, and examples thereof include mineral oil (paraffin oil), vaseline (white vaseline, etc.), and the like.
In some preferred embodiments, the content of the softener (B4) is preferably 20 to 80 parts by mass, and more preferably 20 to 60 parts by mass, relative to 100 parts by mass of the base oil (B1). When the content of the softening agent falls within the above range, the corrosion resistance of the corrosion-protected structure can be further improved, and the workability of the undercoat layer formed from the undercoat composition is also excellent.
Examples of the heat-resistant upper material (B5) include: organobentonite, crystalline wax, and the like. These temperature-resistant upper materials may be used singly or in combination of two or more.
Organobentonite is an inorganic mineral/organoammonium complex which can be made, for example, by: the bentonite is used as a raw material, and the bentonite is prepared by inserting an organic covering agent through an ion exchange technology by utilizing the lamellar structure of montmorillonite in the bentonite and the characteristic that the montmorillonite can be swelled and dispersed into colloidal clay in water or an organic solvent.
Commercially available organobentonite can be used. Commercially available products of organobentonite include, for example: zhejiang Huate BP-186C, etc.
In the under-coating composition of the present invention, the organic bentonite is included, and the organic bentonite absorbs oil and swells in the base oil to form a gel, so that the oil component can be captured or supported, and thus the dropping point of the oil component can be increased, and the corrosion resistance can be improved.
As the crystalline wax, a wax in which a crystallization peak appears during temperature rise at a constant rate of 10 ℃/min using a Differential Scanning Calorimetry (DSC) apparatus is referred to. The crystalline wax is not limited to a single type of crystalline wax, but may be a combination of a plurality of types of waxes as long as the entire crystalline wax exhibits crystallinity.
In some preferred embodiments, the crystalline wax may include a fatty acid amide-based wax and a hydrocarbon-based wax (hydrocarbon wax). These may be used alone, or 2 or more kinds may be used in combination. Among these, fatty acid amide waxes are preferable from the viewpoint of effectively increasing the dropping point of the oil component, and fatty acid amide waxes having a melting point of 120 to 160 ℃ are more preferable.
Examples of the hydrocarbon-based wax (hydrocarbon wax) include: paraffin wax, microcrystalline wax, fischer-tropsch wax, polyethylene wax, oxidized polyethylene wax, polypropylene wax, oxidized polypropylene wax, and the like. Examples of commercially available products of the hydrocarbon-based wax include: polypropylene wax (PPW-0921) manufactured by Nanjing Tianshi corporation, and the like.
As the fatty acid amide-based wax, it may be a reaction product between a fatty acid and an amine. From the viewpoint of effectively increasing the dropping point of the oil component, a fatty acid amide wax having 17 to 50 carbon atoms is preferably used.
Examples of the fatty acid amide-based wax include: methylene bis lauric acid amide, methylene bis palmitic acid amide, methylene bis myristic acid amide, methylene bis stearic acid amide, methylene bis behenic acid amide, ethylene bis lauric acid amide, ethylene bis palmitic acid amide, ethylene bis myristic acid amide, ethylene bis stearic acid amide, or ethylene bis behenic acid amide.
The fatty acid amide wax may be synthesized by a conventionally known method or may be commercially available.
In the undercoating composition of the present invention, when the composition is heated to a temperature not lower than the melting point and slowly cooled, the composition contains the crystalline wax, and the composition can form microcrystals in the base oil and form a stable three-dimensional network structure, thereby exhibiting an ability to hold an oil component, and thus the dropping point of the oil component can be increased, and the corrosion resistance can be improved.
In some preferred embodiments, the melting point of the crystalline wax is preferably 120 ℃ or higher, more preferably 130 ℃ or higher, from the viewpoint of increasing the temperature resistant to the temperature under the stream. The melting point of the crystalline wax is preferably 160 ℃ or lower, more preferably 150 ℃ or lower, from the viewpoint of ease of processing.
In some preferred embodiments, the content of the temperature-resistant upper material (B5) is preferably 5 to 40 parts by mass, and more preferably 10 to 36 parts by mass, based on 100 parts by mass of the base oil (B1). When the content of the temperature-resistant upper material falls within the range, the dropping point of the oil can be increased, the dropping of the oil can be effectively improved, and the corrosion resistance is excellent. In addition, when the content of the temperature-resistant primer is within the above range, excellent adhesion can be obtained, and the primer can be effectively attached to the surface of a coating (e.g., a metal member).
When the content of the heat resistant upper material is less than 5 parts by mass, insufficient heat resistance is likely to occur, and excellent heat resistance and adhesion are not likely to be compatible. When the content of the heat resistant upper material is more than 40 parts by mass, workability and adhesion are easily deteriorated, which is disadvantageous in industrial construction.
In addition to the above components, the mineral oil-based coating composition may contain, as required, various additives that are generally used in the field of corrosion protection, such as a viscosity modifier, a coupling agent, a surfactant, an antioxidant, an anti-aging agent, an anti-mold agent, an insect repellent, an anti-rat agent, and an antibacterial agent, in a range that does not impair the effects of the present invention. With respect to such various additives, conventionally known additives can be used by a conventional method.
(Oxidation polymerization type undercoating composition)
As the oxidative polymerization type undercoating composition, a commercially available product, for example, oxidative polymerization type undercoating XG-PN manufactured by Nindon electric corporation, can be used.
[ ultraviolet light blocking layer (UV blocking layer) ]
The corrosion-resistant structure of the present embodiment has the UV blocking layer on the air interface side of the petrolatum based corrosion-resistant band layer, and thus can block irradiation of ultraviolet rays and suppress damage to the corrosion-resistant structure, and as a result, the corrosion-resistant structure can have excellent corrosion resistance and corrosion resistance life even when used in an outdoor environment.
In some preferred embodiments, the UV-blocking layer may be a protective paint layer or a protective tape.
The overcoat layer may be formed of, for example, an acrylic coating, a polyurethane coating, an epoxy coating, or the like. The method for forming the overcoat layer is not particularly limited, and the overcoat layer can be formed by a conventionally known method, for example, by applying an acrylic paint or the like to the surface of a release liner having releasability and drying the acrylic paint, and then releasing the release liner.
As the acrylic coating material, commercially available products can be used, and examples thereof include: XG-T manufactured by Nindon electric corporation. As the polyurethane coating material, commercially available products can be used, and examples thereof include: a polyurethane waterproof coating for house guardians manufactured by Shanghai Ganlong industries, Ltd.
The coating is applied to the surface of the mineral anticorrosive tape layer, and then dried and cured to form the main body of the coating film.
In some preferred embodiments, the UV-blocking layer is preferably a protective tape. As the protective tape, it is preferably formed of a protective layer and an optional adhesive layer.
Examples of the material for forming the protective layer include polyvinyl chloride, polyethylene, polypropylene, butyl rubber, asphalt, aluminum film, polyester, polyurethane, and synthetic rubber. From the viewpoint of workability, polyvinyl chloride and polyethylene are preferable.
The protective layer may be provided with an adhesive layer on the surface. Examples of the adhesive agent for forming the adhesive layer include a rubber adhesive agent and an acrylic adhesive agent.
In some preferred embodiments, the UV blocking layer preferably further contains an ultraviolet absorber because it constitutes the outermost surface of the corrosion protection structure.
In some preferred embodiments, the UV blocking layer preferably has an ultraviolet transmittance (UV transmittance) of 1% or less, and more preferably 0.5% or less. The corrosion-resistant structure of the present embodiment can block irradiation of ultraviolet rays by setting the UV transmittance of the UV blocking layer to 1% or less, suppress deterioration of the corrosion-resistant structure by ultraviolet rays, and further suppress corrosion of a coating object (e.g., a metal member).
In addition, UV (ultraviolet) in the UV transmittance refers to a wavelength of 300 nm.
In some preferred embodiments, the thickness of the UV blocking layer is preferably 0.1 to 3mm, and more preferably 0.1 to 1.5 mm. By setting the thickness of the UV blocking layer within the above range, the corrosion-resistant structure can be protected from external force, and workability and corrosion resistance can be improved.
In some preferred embodiments, the UV blocking layer may be 1 layer, or 2 or more layers.
[ anti-corrosive daub layer ]
And filling an anti-corrosion daub layer in the irregular-shaped concave-convex part on the surface of the bottom coating layer to obtain a smooth surface, so that the petrolatum type anti-corrosion belt layer can be conveniently pasted and wrapped. The filling amount of the anti-corrosion daub is not particularly limited, and can be adjusted and selected by a person skilled in the art according to the actual use environment, the product requirements or the anti-corrosion requirements. In order to improve the effect of comprehensive protection, the filling manner of the anti-corrosion daub is preferably smooth transition or smooth inclined surface filling irregular-shaped concave-convex parts with slopes.
The specific process of filling the anticorrosion mastic is not particularly limited, and may be a conventional process of filling such anticorrosion materials, which is well known to those skilled in the art. From the aspect of improving the effect of comprehensive protection, the concrete process of filling the anti-corrosion daub is preferably as follows: the anticorrosion daub is filled in the position with an irregular shape, and for special-shaped structures such as bolts, nuts and the like and vertical corners, smooth transition with a certain gradient is filled by the anticorrosion daub, so that the subsequent adhesion of a petrolatum anticorrosion belt layer is facilitated, and rainwater and the like are prevented from accumulating.
The filling anticorrosive mortar may be any commercially available one, and examples thereof include: XG-M manufactured by Nindon electric corporation.
< use >
The corrosion-resistant structure disclosed herein can be widely used in various general environments, for example, outdoors, in a high-temperature environment for a long period of time, in a place where direct sunlight is irradiated, and the like.
Examples
The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. The evaluation methods in examples are as follows. In the examples, "part" is based on weight unless otherwise specified. The components used in the examples are commercially available.
< evaluation test >
(temperature resistance of the undercoat layer against temperature flow)
Determined according to appendix A of GB/T32119-2015.
Specifically, the thermostatic drying oven was adjusted to be maintained at a set temperature (40 ℃). Selecting 3Q 235 steel plates with the thickness of 80mm multiplied by 60mm multiplied by (3-5) mm, polishing the steel plates in the long edge direction by using No. 240 abrasive paper, dipping the steel plates in acetone or ethanol by using gauze to clean the steel tubes, removing impurities on the surfaces, and drying the surfaces. On the surface of each test steel plate 80mm × 60mm, black lines are drawn at positions 18mm and 15mm from the lower end. A100-150 um thick primer sample film is applied to the surface on which the test steel sheet is scribed.
And (3) putting the whole device into a constant-temperature drying box with well-regulated temperature, keeping the whole device vertical, and observing whether the sample film flows onto a reference line after 24 hours. The sample films of the 3 experimental steel plates were judged to be acceptable if they did not flow or did not flow to the reference line. Otherwise, judging that the sample film is unqualified, and if the sample film is qualified, gradually increasing the temperature at intervals of 10 ℃ to repeat the experiment until the sample film is observed to flow, and recording the previous temperature point of the sample film flowing as the temperature resistant flowing-down temperature.
(temperature resistance of petrolatum anticorrosive tape layer against falling temperature)
Determined according to GB/T30651.
Specifically, 500mm × 50mm samples were cut from the petrolatum based anticorrosive tape layers of the examples and comparative examples. And adjusting the constant-temperature drying box to keep the constant-temperature drying box at the set temperature. And dipping the steel pipe with gauze, cleaning the steel pipe with acetone or ethanol, removing impurities on the surface, and drying the surface. And winding the sample for two circles in the middle of the steel pipe, removing the redundant sample, and flattening the surface. And (3) placing the steel pipe wound with the sample on a support, and placing a tray below the steel pipe. And (3) putting the whole device into a constant-temperature drying box with well-regulated temperature, keeping the device horizontal, observing whether the composite drips in the tray after 24 hours, and if the composite does not drip, gradually increasing the temperature at intervals of 10 ℃ to repeat the experiment until the composite drips are observed, and recording the previous temperature point of the dripping temperature of the composite as the temperature resistant flowing-down temperature.
(peeling Strength of petrolatum Corrosion preventive layer)
The peel strength was determined according to GB/T32119-2015 appendix H.
Specifically, the petrolatum based anticorrosive tape layers of the examples and comparative examples were left at 23. + -. 2 ℃ for 24 hours and cut into 150 mm. times.25 mm samples. The above samples of the mineral anticorrosive tape layer were attached to one end of a test steel plate (304 stainless steel) with a contact surface of about 50mm × 25 mm. A polyester film having a thickness of 25 μm and a size of 150 mm. times.50 mm was placed on the sample, and the sample was rolled back and forth 1 time by a rolling device having a weight of about 2kg to closely adhere the sample to a steel plate. After leaving for 30min, the sample adhered to the polyester film was held by an upper jig of a tensile tester, and a test steel plate was held by a lower jig, and the sample was pulled at a speed of (300 ± 30) mm/min by the tensile tester, and the force (maximum value) immediately after the sample started to separate from the steel plate was read and recorded as the peel strength.
(UV transmittance)
Determined according to GBT 17032-1997.
(Heat resistance (thermal cycle test))
Using a steel pipe having a diameter of 50mm and a length of 300mm, a primer layer (300 g/m) was provided in this order 2 ) The method comprises the steps of winding a petrolatum anti-corrosion belt layer, overlapping and winding the petrolatum anti-corrosion belt layer on a steel pipe in a length of 350mm (length) multiplied by 50mm (width), and then arranging a UV shielding layer on the petrolatum anti-corrosion belt layer.
After the UV blocking layer is dried, putting the UV blocking layer into an oven, and setting the conditions as follows: thermal cycling experiments were carried out at-20 ℃ (4h) to 80 ℃ (8 h).
The oil-free dripping was judged as "O" for 360 hours or longer, and the oil-containing dripping was judged as "X".
(durability (ultraviolet ray resistance))
The assay was performed according to GBT 1865-.
Specifically, a steel plate of 100mm (length) × 70mm (width) in width was used. And (3) polishing the steel pipe along the long edge direction by using No. 240 abrasive paper, dipping the steel pipe in acetone or ethanol by using gauze, cleaning impurities on the surface of the steel pipe, and drying the surface of the steel pipe.
An undercoat layer (300 g/m) was provided in this order 2 ) Winding a petrolatum anti-corrosion strip layer, wrapping the petrolatum anti-corrosion strip layer on one side of the steel pipe in a single layer of 150mm (length) x 100mm (width), and then wrapping the petrolatum anti-corrosion strip layer on the steel pipe in a single layer of the petrolatum anti-corrosion strip layerThe anti-corrosion strip layer is provided with a UV blocking layer to form an anti-corrosion structure.
Placing the prepared corrosion-resistant structural body sample into a xenon lamp aging tester, and setting conditions as follows: air temperature 38 ℃, BPT: irradiation dose of 180W/m at 63 DEG C 2 And spraying water for 18 min/2 h.
After 2000h, the corrosion-resistant structure was peeled off, and the presence or absence of corrosion in the steel sheet was visually observed. The non-corrosion was judged as "good", and the corrosion was judged as "x".
(durability (thermal cycle 1000h + salt spray experiment 2000h))
A steel plate of 100mm (length) × 70mm (width) was used. And (3) polishing the steel pipe along the long edge direction by using No. 240 abrasive paper, dipping the steel pipe in acetone or ethanol by using gauze, cleaning impurities on the surface of the steel pipe, and drying the surface of the steel pipe.
An undercoat layer (300 g/m) was provided in this order 2 ) Winding a petrolatum anti-corrosion belt layer, wherein the petrolatum anti-corrosion belt layer is wrapped on one side of the steel pipe in a single layer of 150mm (length) x 100mm (width), and then arranging a UV shielding layer on the petrolatum anti-corrosion belt layer to form an anti-corrosion structure.
Putting the prepared corrosion-resistant structural body sample into an oven, wherein the setting conditions are as follows: thermal cycling experiments were carried out for 1000h at-20 ℃ (4h) to 80 ℃ (8 h).
The heat treated samples were placed in a salt spray test box for corrosion testing for 2000 h. The conditions of the corrosion test were:
spraying saline 35 deg.C (5% saline) for 2hr
Dried 60 deg.C/25% RH4hr
Humidification 50 ℃/98% RH2hr
After 2000h of the salt spray corrosion test, the sample was peeled off, and whether the steel plate was corroded was visually observed. The non-corrosion was judged as "good", and the corrosion was judged as "x".
Preparation example 1:
100 parts by mass of petrolatum, 30 parts by mass of liquid paraffin, 8 parts by mass of tannic acid, 40 parts by mass of talcum powder, 11 parts by mass of amide wax (melting point: 140-146 ℃) and 16 parts by mass of organic bentonite are added into a reaction vessel one by one, heated to 150 ℃ and stirred and mixed uniformly. Then naturally cooling to room temperature to prepare the mineral lipid base coating material 1.
Preparation example 2:
100 parts by mass of petrolatum, 30 parts by mass of liquid paraffin, 8 parts by mass of tannic acid, 40 parts by mass of talcum powder and 11 parts by mass of amide wax (melting point: 140-146 ℃) are added into a reaction vessel one by one, heated to 150 ℃, and stirred and mixed uniformly. Then naturally cooling to room temperature to prepare the mineral lipid base coating material 2.
Preparation example 3:
100 parts by mass of petrolatum, 30 parts by mass of liquid paraffin, 8 parts by mass of tannic acid and 40 parts by mass of talcum powder are added into a reaction vessel one by one, heated to 150 ℃, stirred and mixed uniformly. Then naturally cooling to room temperature to prepare the mineral lipid base coating material 3.
Preparation example 4:
oxidative polymerization type undercoating material 4: NITOHULLMAC XG-PN, manufactured by NITOKIRIN DENKO K.K.
Preparation example 5:
100 parts by mass of petrolatum, 1 part by mass of tannic acid, 30 parts by mass of talcum powder, 60 parts by mass of aluminum hydroxide and 26 parts by mass of amide wax (melting point: 140-146 ℃) are added into a reaction vessel one by one, heated to 150 ℃, and stirred and mixed uniformly.
The polyester nonwoven fabric was immersed in the mixture prepared above, and the mixture was sufficiently immersed in the polyester nonwoven fabric, followed by cooling to room temperature to obtain the petrolatum based anticorrosive tape layer 1. The thickness of the petrolatum type corrosion resistant band layer 1 was 1.1 mm. The temperature of the petrolatum corrosion resistant strip layer 1 is 120 ℃.
Preparation example 6:
100 parts by mass of petrolatum, 1 part by mass of tannic acid, 30 parts by mass of talcum powder, 60 parts by mass of aluminum hydroxide, 7 parts by mass of amide wax (melting point: 140-146 ℃) and 5 parts by mass of organobentonite are added into a reaction vessel one by one, heated to 150 ℃, and stirred and mixed uniformly.
And (3) soaking the polyester non-woven fabric into the prepared mixture, fully soaking the polyester non-woven fabric into the mixture, and cooling to room temperature to obtain the petrolatum anti-corrosion belt layer 2. The thickness of the mineral wool anti-corrosion strip layer 2 was 1.1 mm. The temperature of the mineral anticorrosion strip layer 2 is 100 ℃ under the temperature of flowing.
Preparation example 7:
100 parts by mass of petrolatum, 1.1 parts by mass of tannic acid, 65 parts by mass of talcum powder and 3 parts by mass of amide wax (melting point: 140-146 ℃) are added into a reaction vessel one by one, heated to 150 ℃, and stirred and mixed uniformly.
And (3) soaking the polyester non-woven fabric into the prepared mixture, fully soaking the polyester non-woven fabric into the mixture, and cooling to room temperature to obtain the petrolatum anti-corrosion belt layer 3. The thickness of the petrolatum corrosion protection tape layer 3 was 1.1 mm. The temperature of the mineral anticorrosion strip layer 3 is 60 ℃ under temperature.
Preparation example 8:
oxidative polymerization type coating: NITOHULLMAC XG-T manufactured by NITOHULLMAC K.K.
Preparation example 9:
PU coating: a polyurethane waterproof coating for house guardians manufactured by Shanghai Ganlong industries, Ltd.
Example 1
The coating protected by the anticorrosive structure is a steel pipe or steel plate made of Q235 material.
Formation of undercoat layer of anticorrosive structure the petrolatum based undercoat material 1 prepared in preparation example 1 above was used.
The mineral lipid priming material 1 is added at a ratio of 300g/m 2 The coating amount of (3) is applied to the surface of a steel pipe or a steel plate to form an undercoat layer.
Then, the petrolatum based corrosion protection tape layer 1 prepared in preparation example 5 above was wound on the primer layer in a half wrapping manner.
Next, 2 layers of the oxidative polymerization type coating material of preparation example 8 were applied to the mineral anticorrosive tape layer 1 to form a UV blocking layer on the mineral anticorrosive tape layer 1. Thereby, an anticorrosive structure is obtained.
Examples 2 to 5
An anticorrosive structure was obtained in the same manner as in example 1, except that the primer layer, the petrolatum based anticorrosive tape layer, and the UV blocking layer were changed as shown in table 1. The evaluation results are shown in table 1.
Comparative examples 1 to 5
An anticorrosive structure was obtained in the same manner as in example 1, except that the primer layer, the petrolatum based anticorrosive tape layer, and the UV blocking layer were changed as shown in table 1. The evaluation results are shown in table 1.
TABLE 1
As shown in table 1, examples 1 to 5 were excellent in the evaluation results of durability (ultraviolet ray resistance) and durability (heat cycle 1000h + salt spray test 2000h) without oil analysis, and also excellent in corrosion resistance even when used in an outdoor environment such as a high-temperature environment or a place where direct sunlight is irradiated, and also excellent in workability while heat resistance and adhesion can be excellently achieved. In addition, the anti-corrosion structures of examples 1 to 5 added with aluminum hydroxide have a flame-retardant property, can effectively cope with sudden fire to a certain extent, reduce the damage degree of the fire to equipment facilities, guarantee the safety of personnel and reduce the damage caused by the fire, and can be used for the anti-corrosion protection of equipment or buildings needing flame retardance.
As shown in table 1, the oil analysis results, the durability (ultraviolet ray resistance) and the evaluation results of at least one of the durability (heat cycle 1000h + salt spray test 2000h) of comparative examples 1 to 5 were poor, and thus, the oil could not be used as an anticorrosive structure desired in an outdoor environment.
Industrial applicability
The anticorrosive structure of the present invention can be used in outdoor environments, can have excellent anticorrosive performance even when used in high-temperature environments or places irradiated with direct sunlight, can effectively block ultraviolet rays, has a long anticorrosive life, is excellent in paintability and appearance, and is also excellent in heat resistance, ultraviolet resistance and workability. In addition, the anti-corrosion structure is suitable for coating and corrosion prevention of structures in any shapes, and has wide application prospect in outdoor environment.
Claims (9)
1. An anti-corrosion structure comprising:
a mineral anticorrosive tape layer;
a primer layer disposed on one side of the mineral-based corrosion protection tape layer; and
an ultraviolet shielding layer provided on the opposite side of the petrolatum based anticorrosive tape layer from the undercoat layer,
the temperature of the petrolatum anti-corrosion belt layer is over 90 ℃,
the peel strength of the mineral anti-corrosion belt layer is more than 600N/m,
the mineral anti-corrosion tape layer comprises a temperature-resistant upper material A5,
the temperature-resistant upper material A5 comprises organic bentonite and/or crystalline wax,
the temperature of the bottom coating is over 70 ℃ under the flowing-down resistance.
2. The anti-corrosion structure of claim 1, wherein said layer of the mineral corrosion protection tape further comprises a base oil A1,
the content of the temperature-resistant upper material A5 is 10-40 parts by mass relative to 100 parts by mass of the base oil A1.
3. The anti-corrosion structure according to claim 1, wherein said layer of the mineral wool anti-corrosion tape further comprises a base oil A1 and an inorganic filler A2,
the content of the inorganic filler A2 is 50 to 120 parts by mass with respect to 100 parts by mass of the base oil A1.
4. The anti-corrosion structure according to claim 3, wherein the inorganic filler A2 includes at least one selected from the group consisting of talc, aluminum hydroxide, and magnesium hydroxide.
5. The anti-corrosion structure according to any one of claims 1 to 4, wherein the petrolatum anti-corrosion tape layer has a flame retardant property.
6. The anti-corrosion structure according to any one of claims 1 to 5, wherein the primer layer is formed from a primer composition,
the base coating composition comprises a mineral-based base coating composition or an oxidative polymerization-type base coating composition,
the mineral base coating composition comprises a temperature-resistant upper material B5,
preferably, the temperature-resistant upper material B5 includes organic bentonite and/or crystalline wax.
7. The anti-corrosion structure according to claim 6, wherein the mineral based coating composition further comprises a base oil B1,
the content of the temperature-resistant upper material B5 is 5-80 parts by mass relative to 100 parts by mass of the base oil B1.
8. The anticorrosive structure according to any one of claims 1 to 7, wherein the ultraviolet ray transmittance of the ultraviolet ray blocking layer is 1% or less.
9. The corrosion-protected structure according to any one of claims 1 to 8, further comprising an anti-corrosive mastic layer provided between the primer layer and the petrolatum-based anti-corrosive tape layer.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110258308.6A CN115042487A (en) | 2021-03-09 | 2021-03-09 | Corrosion-resistant structure |
| TW110143801A TW202246056A (en) | 2021-03-09 | 2021-11-24 | Anti-corrosion structure body |
| PCT/CN2021/133046 WO2022188462A1 (en) | 2021-03-09 | 2021-11-25 | Anti-corrosion structure body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110258308.6A CN115042487A (en) | 2021-03-09 | 2021-03-09 | Corrosion-resistant structure |
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| CN115042487A true CN115042487A (en) | 2022-09-13 |
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| CN202110258308.6A Pending CN115042487A (en) | 2021-03-09 | 2021-03-09 | Corrosion-resistant structure |
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| CN (1) | CN115042487A (en) |
| TW (1) | TW202246056A (en) |
| WO (1) | WO2022188462A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115429099A (en) * | 2022-09-28 | 2022-12-06 | 武汉苏泊尔炊具有限公司 | Corrosion-resistant cookware and method of making same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100552089C (en) * | 2006-05-26 | 2009-10-21 | 株式会社那卡波技工 | The coating and anti-corrosion method of steel |
| JP7015629B2 (en) * | 2015-12-04 | 2022-02-03 | 日東電工株式会社 | Base sheet |
| JP6390742B1 (en) * | 2017-03-30 | 2018-09-19 | 日東電工株式会社 | Anticorrosion structure |
| CN210831027U (en) * | 2019-09-29 | 2020-06-23 | 山东胜跃防腐材料有限公司 | Anticorrosive area of petrolatum |
-
2021
- 2021-03-09 CN CN202110258308.6A patent/CN115042487A/en active Pending
- 2021-11-24 TW TW110143801A patent/TW202246056A/en unknown
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115429099A (en) * | 2022-09-28 | 2022-12-06 | 武汉苏泊尔炊具有限公司 | Corrosion-resistant cookware and method of making same |
| CN115429099B (en) * | 2022-09-28 | 2024-04-26 | 武汉苏泊尔炊具有限公司 | Corrosion-resistant cooker and method for manufacturing same |
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| TW202246056A (en) | 2022-12-01 |
| WO2022188462A1 (en) | 2022-09-15 |
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