CN1063161C - Coating resisting molten-metal aluminium liquid corrosion and coating method thereof - Google Patents
Coating resisting molten-metal aluminium liquid corrosion and coating method thereof Download PDFInfo
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- CN1063161C CN1063161C CN97100841A CN97100841A CN1063161C CN 1063161 C CN1063161 C CN 1063161C CN 97100841 A CN97100841 A CN 97100841A CN 97100841 A CN97100841 A CN 97100841A CN 1063161 C CN1063161 C CN 1063161C
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Abstract
The present invention belongs to the field of coating material and is mainly suitable for the corrosion of molten-resistant metal aluminium liquid. The coating material of the present invention comprises chemical compositions (according to weight percent) as follows: 40% to 60% of emery powder, 15% to 30% of refractory clay, 9% to 10% of bentonitic clay, 8% to 12% of fluxing agents, 2% to 3% of HB type permeability-reducing agents, 5% to 10% of binding agents and 1% to 2% of liquid auxiliary agents. A method for coating material on the surface of metal material comprises metal material surface cleaning, coating of the coating material and drying processing. A coating layer formed by coating the coating material on a metal basal body has strong bonding force with the basal body; the coating layer is dense and is not easily invaded or etched by aluminium liquid; besides, the coating layer has long service life.
Description
The invention belongs to paint field.Mainly be applicable to the metal material surface that needs resisting molten-metal aluminium liquid corrosion.
Resemble in the production unit of hot-dip aluminizing and so on, placing the metal of hot dip aluminum pot (or groove) to sink to part is one of key equipment, as the roller that sinks, support arm, stove nose etc. all are the vitals that sinks in the hot dip aluminum pot (or groove), no matter this base part is to adopt 05F, 08F, A3, No. 20 steel, soft steel, still adopt cast iron, all be subjected to high temperature aluminum liquid (680～720 ℃) etch, wash away, seriously corroded seriously influences the work-ing life of sinking to part in these hot dip aluminum pots (or groove).In the prior art, in order to prevent that molten metal aluminium liquid to sinking to the corrosion of part, adopting heat resisting coating that metal is sunk to part usually and applying protection.For example Japanese kokai publication sho 52-58736, spy open clear 46-37273 and Chinese patent application 96109105.3 all provides a kind of resistant to elevated temperatures coated coating, but these coating are difficult to form the competent blocking layer that prevents the immersion of aluminium liquid, etch in molten metal aluminium liquid, promptly resist molten metal aluminium liquid erosive ability, work-ing life is very short.
The object of the present invention is to provide a kind of coating and coating method of resisting molten-metal aluminium liquid corrosion.This coating can have clinging power preferably with the matrix of the hardware that places high-temperature fusion aluminium liquid, formed the competent blocking layer that prevents the intrusion of aluminium liquid, etch, prevent the corrosion that aluminium liquid sinks to part to metal effectively, solve the problem that places the hardware seriously corroded of hot-dip aluminizing pot in the hot-dip aluminizing production line.
At above-mentioned purpose, the designing chemical composition of resisting molten-metal aluminium liquid coating of the present invention (weight %) is: lapis amiridis 40～60%, fireclay 15～30%, wilkinite 9～10%, fusing assistant 8～12%, HB type resistance penetration enhancer 2～3%, binding agent 5～10%, liquid flux 1～2%.
Wherein, the chemical constitution of fusing assistant (weight %) is: sliding scholar's powder 20～40%, mica 60～80%; Liquid flux be in propyl carbinol, Pentyl alcohol or the tbp any.
HB type resistance penetration enhancer is made up of sodium rectorite leng and water, and its proportioning (weight ratio) is:
The sodium rectorite leng: water is 1: (3-5).
The granularity requirements of sodium rectorite leng≤45 μ m.
Binding agent is the liquid composite inorganic-organic binder bond of TC type.Liquid composite inorganic-the organic binder bond of TC type is made up of carbonyl methyl cellulose sodium and polymeric phosphate, and its proportioning (weight %) is: carbonyl methyl fiber sodium 20-30%.Polymeric phosphate 70-80%.Both batchings and mix after again with water with 1: proportioning (10-15) is mixed with colloid, promptly becomes the liquid inorganic organic binder bond of TC type.
In the coating, the effect of lapis amiridis, fireclay, fusing assistant and binding agent is when coating is used under high temperature (600～800 ℃), these combination raw materials can at high temperature form fine and close enamel body barrier, stop of invasion or the etch of aluminium liquid to matrix, simultaneously, the existence of fusing assistant makes coating can expand and do not crack and peel off with matrix under 600～800 ℃ of high temperature.Resistance penetration enhancer in the coating can increase the surface tension of aluminium liquid and coating, makes aluminium liquid not soak into, not invade corrosion to coating, guarantees to sink to metalwork in the molten metal aluminium liquid not by the aluminium corrosion, makes metal sink to part and keeps the favorable mechanical performance; Liquid adjuvants is to prevent that coating from producing bubble owing to stirring, and influences coating quality.
The compound method of coating of the present invention is as follows: according to chemical composition proportioning is got the raw materials ready earlier, afterwards, powder raw material fitted over together mix, to be mixed evenly after, add liquid composite inorganic-organic binder bond of TC type and liquid flux, stir once more, carry out ball milling after evenly, and to control its density be 3.2～3.6g/cm
3, can apply subsequently.
The applying coating of resisting molten-metal aluminium liquid corrosion of the present invention comprises metal material surface cleaning, applying coating and 3 operations of drying treatment at the coating method of metal material surface, and existing division is as follows:
(1), needs the cleaning of metallizing material surface
With the surface that needs sink to metallic substance in the molten metal aluminium liquid or metallic element deoil, rust cleaning and shot peening, make its no greasy dirt in surface and rusty scale, the matrix of cleaning is exposed on the surface, and has certain roughness.
(2), applying coating
Can adopt craft or mechanical means, paint brush is coated in through clearing up the clean metallic substance or the surface of metallic element.Coat-thickness is 0.3～0.8mm.
(3), drying treatment
The metallic substance or the metallic element that are coated with application layer are put into heat treatment furnace, coating is carried out drying treatment, treatment temp is 100～200 ℃, in 0.2～2.5 hour treatment time, requires heat-up rate＜100 ℃/hour simultaneously.
Metallic substance after drying is handled and metallic element can sink in the molten metal aluminium liquid and use.
Compared with prior art, the present invention has following advantage:
(1) because coating forms fine and close enamel body blocking layer at matrix surface, so aluminium liquid is difficult for invading or the etch matrix, it is strong to make it solidity to corrosion, the component long service life sank in the aluminium liquid after 60 days, and coating is still intact, prior art immerses two days later, then begins corrosion.
(2) because coating and basal body binding force are strong, do not peel off, strengthened the work-ing life of coating yet.
(3) compound method is simple.
(4) starting material of coating source is sufficient, and price is low, and promptly cost is low.
(5) before the metalwork of applying coatings used and takes out in the aluminium liquid of back, coating was peeled off automatically, can apply once more, continues to use.
Embodiment
According to coatings chemistry composition of the present invention, prepared 5 batches of coating, the concrete chemical ingredients of 5 batches of coating is shown in table 1, table 2.Then 5 batches of coating are coated in five kinds of metal material surfaces respectively, the material and the size of five kinds of metallic substance are as shown in table 3, and the processing parameter of coating method is as shown in table 4.With 5 kinds the metalwork of applying coatings to put into temperature be 710 ℃ molten metal aluminium liquid, and immerse different time (fate) back respectively and take out, the check metalwork situation that is corroded, assay is as shown in table 5.
In order to contrast, adopted in the prior art commercially available TP type heat resisting coating on the metal base surface of four kinds of materials, also to carry out the coating test.Basic material and specification, coating method and corrosion test result also list in the corresponding table.Table 1 embodiment chemical ingredients (weight %)
Annotate: binding agent is the chemical constitution (weight %) of fusing assistant in the liquid composite inorganic-organic binder bond table 2 of the TC type embodiment coatings chemistry composition
Appended body material material of table 3 embodiment coating and dimensions
Table 4 embodiment applying coating processing parameter
Table 5 embodiment and the anti-aluminium corrosion of Comparative Examples coating assay
Claims (3)
1, a kind of coating of refractory erosion metal aluminium liquid corrosion is characterized in that the chemical ingredients (weight %) of coating is:
Lapis amiridis 40～60%, fireclay 15～30%, wilkinite 9～10%, fusing assistant 8～12%, HB type resistance penetration enhancer 2～3%, the liquid composite inorganic-organic binder bond 5～10% of TC type, liquid flux 1～2%;
Wherein, the chemical constitution of fusing assistant (weight %) is: sliding scholar's powder 20～40%, mica 60～80%;
Liquid flux be in propyl carbinol, Pentyl alcohol or the tbp any.
2, coating according to claim 1, the density that it is characterized in that coating is 3.2～3.6g/cm
3
3, a kind of with the coating method of the described applying coating of claim 1 at metal material surface, comprise that at first employing is deoiled, processing of rust removing is cleared up metal material surface, adopt craft or mechanical means afterwards, paint brush is coated in through clearing up clean metal material surface, carry out drying treatment at last, it is characterized in that:
(1), metal material surface deoil the rust cleaning after, also must carry out shot peening;
(2), coat-thickness is 0.3～0.8mm;
(3), the drying treatment parameter is: treatment temp is 100～200 ℃, and the treatment time is 0.2～2.5 hour, heat-up rate≤100 ℃/hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97100841A CN1063161C (en) | 1997-03-14 | 1997-03-14 | Coating resisting molten-metal aluminium liquid corrosion and coating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97100841A CN1063161C (en) | 1997-03-14 | 1997-03-14 | Coating resisting molten-metal aluminium liquid corrosion and coating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1161946A CN1161946A (en) | 1997-10-15 |
| CN1063161C true CN1063161C (en) | 2001-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97100841A Expired - Fee Related CN1063161C (en) | 1997-03-14 | 1997-03-14 | Coating resisting molten-metal aluminium liquid corrosion and coating method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182803A (en) * | 2011-12-28 | 2013-07-03 | 深圳富泰宏精密工业有限公司 | Coated member and preparation method thereof |
| CN106189396B (en) * | 2016-08-12 | 2018-02-13 | 福州布朗新材料技术有限公司 | A kind of high temp glass coating of resistance to aluminium liquid corrosion |
| CN106189397B (en) * | 2016-08-12 | 2018-02-13 | 福州布朗新材料技术有限公司 | A kind of anti-corrosion glass coating of aluminium liquid stirring high temperature resistant |
| CN106280586B (en) * | 2016-08-12 | 2018-02-13 | 福州布朗新材料技术有限公司 | A kind of anti-corrosion inorganic coating of aluminium liquid stirring high temperature resistant |
| CN110252627B (en) * | 2019-06-10 | 2021-06-01 | 辽宁工程技术大学 | Preparation method of aluminum liquid corrosion resistant steel surface oxide coating |
| CN111410559B (en) * | 2020-03-30 | 2022-02-22 | 汉江弘源襄阳碳化硅特种陶瓷有限责任公司 | Heat-insulating coating structure of lift tube and preparation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106485A (en) * | 1986-10-03 | 1988-04-13 | 刘汉生 | Water based iron casting paint |
| CN86106610A (en) * | 1986-10-03 | 1988-04-13 | 刘汉生 | Water base paint for steel casting |
-
1997
- 1997-03-14 CN CN97100841A patent/CN1063161C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106485A (en) * | 1986-10-03 | 1988-04-13 | 刘汉生 | Water based iron casting paint |
| CN86106610A (en) * | 1986-10-03 | 1988-04-13 | 刘汉生 | Water base paint for steel casting |
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| Publication number | Publication date |
|---|---|
| CN1161946A (en) | 1997-10-15 |
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