CN105088218B - A kind of metal surface coating process - Google Patents

A kind of metal surface coating process Download PDF

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Publication number
CN105088218B
CN105088218B CN201510580095.3A CN201510580095A CN105088218B CN 105088218 B CN105088218 B CN 105088218B CN 201510580095 A CN201510580095 A CN 201510580095A CN 105088218 B CN105088218 B CN 105088218B
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parts
metal
silane
metal works
agent
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CN105088218A (en
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夏中选
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Hangzhou yibole Technology Co.,Ltd.
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Hangzhou Xiaoshan Jinrun Surface Active Material Factory
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Abstract

The invention discloses a kind of metal surface coating process, solve the problems, such as in the prior art not environmentally and coating quality difference, its drip irrigation device is that two conjunction liquid being mixed into using cleaning fluid and pickle are handled surface of workpiece, and the formula of wherein cleaning agent is:In parts by weight, 45 50 parts of emulsifying agent, 8 10 parts of bleeding agent, 20 24 parts of water;Washed twice after two conjunction liquid cleanings;Metal works after washing are subjected to activation process;Washed twice again after activation process;The metal works after washing will be again passed by and carry out silane treatment;Application is carried out after being dried by baking.

Description

A kind of metal surface coating process
Technical field
The present invention relates to field of metal surface treatment, more specifically, it relates to a kind of metal surface coating process.
Background technology
Coating metal surfaces are generally divided into two parts:First, metallic surface is handled before application, pretreatment technology is also;Two It is the construction technology of application.Surface treatment is divided into Mechanical Method and chemical method by processing method, and Mechanical Method is by manual method, electricity The methods of power driven tools, flame method or sandblasting ball blast, removes the oxide layer of metal surface, paint and rust;And chemical rule is logical The mode for crossing chemical reaction carries out oil removing, derusting, the process of cleaning, be surface-treated must well with badly directly affecting the quality of application, It is related to antirust ability and the life-span of metal works, is a very important important step.
Metal is carrying out application after surface treatment, and would generally carry out bottoming to metal surface before application, improves The adhesive force and anti-corrosion capability of paint film layer;Play antifriction lubrication in metal cold machining process.The bottoming used at present is equal It is that one layer of phosphating coat is covered in metal surface by phosphatization, or uses chromatedsolution with metal function in gold by chromaking Metal surface generates trivalent or sexavalence chromizing layer, but both the above processing method has larger defect:Environment compatibility is poor and makes With cost height.And because phosphatization needs table to adjust, and need that workpiece is cleaned multiple times after chromaking, cause to use phosphatization and chromaking When to carry out bottoming to metal surface, the defects of long flow path, low production efficiency be present, and phosphatization and chromaking also exist high energy consumption with And environmental pollution it is serious the problem of.
The Chinese patent of Application No. 201110446471.1 is disclosed one kind and metalwork surface is carried out using silane agent Metal works are carried out ungrease treatment first, then washed twice by individually protection, then carry out polishing derusting, are washed again, Caustic dip to be used again, then is washed, and the metal works dipping silanization treating agent after washing, then allows it to solidify, solidification terminates, then It is dipped into acrylic resin soln, after a few minutes, takes out drying, the invented technology, inorganic agent simple to operate, used Stable performance, environmental protection, it effectively instead of phosphatization and chromaking technology.
But the mode of polishing derusting is not particularly suited for all metal works, has the gold such as corner, tubular for some Metal work-pieces polishing is difficult and causes rust and surface film oxide cleaning incomplete because some dead angles can not polish, and causes follow-up silicon Alkane treatment effect is bad and influences follow-up painting effect, application service life is reduced, in addition, existing silane finish is also deposited Antiseptic property is not strong, film forming is uneven, adhesive ability is poor the defects of, painting effect can be also influenceed.
The content of the invention
A kind of in view of the deficienciess of the prior art, gold excellent and environmentally friendly it is an object of the invention to provide painting effect Metal surface coating process.
To achieve the above object, the invention provides following technical scheme:A kind of metal surface coating process, its feature exist In, including step:
A kind of metal surface coating process, it is characterised in that including step:
(1)Two close liquid cleaning, and two be mixed into using cleaning fluid and pickle are closed liquid and carry out degreasing to surface of workpiece And derusting, oxide film dissolving;Described two, which close the cleaning agent formula used in liquid cleaning, is:In parts by weight, emulsifying agent 45-50 Part, bleeding agent 8-10 parts, water 20-24 parts;
(2)Metal works after two conjunction liquid cleanings are washed twice;
(3)Activation, the metal works after washing are subjected to activation process;
(4)Metal works Jing Guo activation process are washed twice again;
(5)Silane treatment, the metal works again passed by after washing are impregnated into silane treatment agent solution, or will Silane finish solution spraying, it is coated to surface treated workpiece surface;
(6)Metal works after silane treatment are toasted by baking;
(7)Application, to carrying out application through the dried metal works of overbaking.
By using above-mentioned technical proposal, using cleaning fluid degreasing, pickle derusting and oxide-film, and by degreasing and Metal body can be caused to corrode in descaling process, after metal works are corroded, it is difficult to wash that its surface, which often leaves one layer with water, The residue class material fallen, they can influence follow-up silane treatment and application, therefore activation is first passed through before silane treatment and removes this Layer residue, then the anti-corrosive properties that last layer macromolecule permeable membrane improves metal works are covered in surface of workpiece by silane treatment The adhesion property of paint vehicle when energy and application, finally dry metal works and application is carried out to metal works.And in the present invention The cleaning fluid used not phosphate-containing and other heavy metal ion, it is environmentally friendly, pollution-free, it disclosure satisfy that environmentally friendly three wastes requirement discharge.
The present invention is further arranged to:The parts by weight formula of the silane finish used in the silane treatment be for: 20 ~ 30 parts of silane coupler, 20 ~ 30 parts of thickener, 5 ~ 7 parts of sodium citrate, 15 ~ 23 parts of pure water;Wherein, it is described silane coupled Agent is double amino silicane coupling agents, and double amino silicane coupling agents are N- (β-aminoethyl-γ-aminopropyl) methyl dimethoxy epoxide Silane, the thickener are hydroxyethyl cellulose.
By using above-mentioned technical proposal, secondly, by being found after many experiments, the content of pure water is reduced, and add It is highly concentrated that the content of thickener and increase silane coupler can accomplish Metal surface silane treatment agent of the present invention, makes Used time only need to enter silane treatment of the present invention easy to carry with 0.2 ‰ ratio and water wiring solution-forming use, and storage is taken up an area It is small;Meanwhile by the use of sodium citrate while complexing, solution and silane film can be made more stable, prevent to sink in water The generation of starch, production equipment is kept cleaning, do not produce hard scale.
Further, since thickener is alternatively arranged as coalescents, Metal surface silane treatment agent is formed in metal surface and oozed The speed of permeable membrane increases, and only needs can form a kind of nano-high molecule permeable membrane in metal surface within 3 ~ 5 seconds, has high timeliness The advantages of;Also, the performance of permeable membrane is improved, strengthens the viscosity and the film forming uniformity of permeable membrane, makes by the present invention in metal The permeable membrane that surface is formed has good quality, and antiseptic property is excellent, and even film layer is continuous, no dust, hangs white image, laminin material Itself, corrosion protection, adhesive force all technical are excellent.
The present invention is further arranged to:The solution pH value control that the silane finish is configured to is 6.8-7.5.
By using above-mentioned technical proposal, needed with existing silane finish under acid conditions of the control PH in 4-6 Compare, the silane finish that the formula is set is 6.8-7.5 using PH requirements, therefore uses the metal after the processing of this silane finish Workpiece can be not required to washing or neutralization procedure, enormously simplify the production cycle of operation difficulty and technique.
The present invention is further arranged to:The concentration of silane finish is 0.2 ‰ in the silane treatment agent solution.
The present invention is further arranged to:Metal works dipping or spray time are the 3-5 seconds during the silane treatment.
The present invention is further arranged to:The baking time is 10-15 minutes, and the baking temperature is 180-200 DEG C.
In summary, a kind of metal surface coating process of the present invention has more environmentally friendly, high financial profit, and surface treatment is without dead Angle, production efficiency is high and the advantages of application long lifespan.
Brief description of the drawings
Fig. 1 is a kind of flow chart of metal surface coating process.
Embodiment
Reference picture 1 is described further to a kind of metal surface coating process of the present invention.
Embodiment one:
A kind of metal surface coating process, it is characterised in that including step:
(1)Two close liquid cleaning, Acidwash solution are configured to first by sulfuric acid, nitric acid and mixed in hydrochloric acid, then in pickling Cleaning agent is added in solution;Described two, which close the cleaning agent formula used in liquid cleaning, is:In parts by weight, 47 parts of emulsifying agent, ooze Saturating 9 parts of agent, 22 parts of water;
(2)Metal works after two conjunction liquid cleanings are washed twice;
(3)Activation, the metal works after washing are subjected to activation process;
(4)Metal works Jing Guo activation process are washed twice again;
(5)Silane treatment, silane treatment agent solution is prepared with 0.2 ‰ ratio, and control the pH value of solution to control 6.8, by silane finish solution spraying to surface treated surface of workpiece, spray time is 5 seconds, wherein at silane The parts by weight formula of the silane finish used in reason be for:25 parts of silane coupler, 30 parts of polyamine ester thickener, citric acid 5 parts of sodium, 23 parts of pure water;
(6)Metal works after silane treatment are toasted by baking, and baking time is 15 minutes, baking temperature 180 ℃;
(7)Application, to carrying out application through the dried metal works of overbaking.
Table 1, the film performance index that embodiment one is formed in 08f steel surfaces
Sequence number Project Index
1 Film layer outward appearance In metal material true qualities
2 Thicknesses of layers 247nm
3 Indoor rust-proof life 107 days
4 Adhesive force 1 grade
5 Flexibility 1mm
6 Under impact resistance 100cm
7 Corrosion resistance Ironware neutral salt spray test:500 hours paint films without come off, bubble, get rusty phenomena such as;Aluminum component second Sour salt mist experiment:1000 hours.
Embodiment two:
A kind of metal surface coating process, it is characterised in that including step:
(1)Two close liquid cleaning, Acidwash solution are configured to first by sulfuric acid, nitric acid or hydrochloric acid, then in Acidwash solution Add cleaning agent;Described two, which close the cleaning agent formula used in liquid cleaning, is:In parts by weight, 46 parts of emulsifying agent, bleeding agent 9 Part, 21 parts of water;
(2)Metal works after two conjunction liquid cleanings are washed twice;
(3)Activation, the metal works after washing are subjected to activation process;
(4)Metal works Jing Guo activation process are washed twice again;
(5)Silane treatment, silane treatment agent solution is prepared with 0.2 ‰ ratio, and control the pH value of solution to control 6.9, surface treated metal works were impregnated into silane treatment agent solution after 4 seconds and taken out, are wherein made in silane treatment The parts by weight formula of silane finish be for:25 parts of silane coupler, 25 parts of thickener, 6 parts of sodium citrate, pure water 19 parts;
(6)Metal works after silane treatment are toasted by baking, and baking time is 12 minutes, baking temperature 190 ℃;
(7)Application, to carrying out application through the dried metal works of overbaking.
Table 2, the film performance index that embodiment two is formed in 08f steel surfaces
Sequence number Project Index
1 Film layer outward appearance In metal material true qualities
2 Thicknesses of layers 264nm
3 Indoor rust-proof life 103 days
4 Adhesive force 1 grade
5 Flexibility 1mm
6 Under impact resistance 100cm
7 Corrosion resistance Ironware neutral salt spray test:500 hours paint films without come off, bubble, get rusty phenomena such as;Aluminum component second Sour salt mist experiment:1000 hours.
Embodiment three:
A kind of metal surface coating process, it is characterised in that including step:
(1)Two close liquid cleaning, Acidwash solution are configured to first by sulfuric acid, nitric acid and mixed in hydrochloric acid, then in pickling Cleaning agent is added in solution;Described two, which close the cleaning agent formula used in liquid cleaning, is:In parts by weight, 45 parts of emulsifying agent, ooze Saturating 8 parts of agent, 20 parts of water;
(2)Metal works after two conjunction liquid cleanings are washed twice;
(3)Activation, the metal works after washing are subjected to activation process;
(4)Metal works Jing Guo activation process are washed twice again;
(5)Silane treatment, silane treatment agent solution is prepared with 0.2 ‰ ratio, and control the pH value of solution to control 7.3, surface treated metal works were impregnated into silane treatment agent solution after 5 seconds and taken out;Wherein make in silane treatment The parts by weight formula of silane finish be for:The parts by weight formula of the silane finish wherein used in silane treatment For for:27 parts of silane coupler, 20 parts of polyamine ester thickener, 7 parts of sodium citrate, 15 parts of pure water;
(6)Metal works after silane treatment are toasted by baking, and baking time is 10 minutes, baking temperature 200 ℃;
(7)Application, to carrying out application through the dried metal works of overbaking.
Table 3, the film performance index that embodiment three is formed in 08f steel surfaces
Sequence number Project Index
1 Film layer outward appearance In metal material true qualities
2 Thicknesses of layers 285nm
3 Indoor rust-proof life 111 days
4 Adhesive force 1 grade
5 Flexibility 1mm
6 Under impact resistance 100cm
7 Corrosion resistance Ironware neutral salt spray test:500 hours paint films without come off, bubble, get rusty phenomena such as;Aluminum component second Sour salt mist experiment:1000 hours.
Example IV:
A kind of metal surface coating process, it is characterised in that including step:
(1)Two close liquid cleaning, Acidwash solution are configured to first by sulfuric acid, nitric acid or hydrochloric acid, then in Acidwash solution Add cleaning agent;Described two, which close the cleaning agent formula used in liquid cleaning, is:In parts by weight, 50 parts of emulsifying agent, bleeding agent 10 Part, 24 parts of water;
(2)Metal works after two conjunction liquid cleanings are washed twice;
(3)Activation, the metal works after washing are subjected to activation process;
(4)Metal works Jing Guo activation process are washed twice again;
(5)Silane treatment, silane treatment agent solution is prepared with 0.2 ‰ ratio, and control the pH value of solution to control 7.5, by silane finish solution spraying, surface treated surface of workpiece is coated to, spray takes out after 3 seconds;Wherein The parts by weight formula of the silane finish used in silane treatment be for:The silane finish wherein used in silane treatment Parts by weight formula be for:20 parts of silane coupler, 29 parts of polyamine ester thickener, 5 parts of sodium citrate, 23 parts of pure water;
(6)Metal works after silane treatment are toasted by baking, and baking time is 13 minutes, baking temperature 185 ℃;
(7)Application, to carrying out application through the dried metal works of overbaking.
Table 4, the film performance index that example IV is formed in 08f steel surfaces
Sequence number Project Index
1 Film layer outward appearance In metal material true qualities
2 Thicknesses of layers 256nm
3 Indoor rust-proof life 107 days
4 Adhesive force 1 grade
5 Flexibility 1mm
6 Under impact resistance 100cm
7 Corrosion resistance Ironware neutral salt spray test:500 hours paint films without come off, bubble, get rusty phenomena such as;Aluminum component second Sour salt mist experiment:1000 hours.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims (3)

1. a kind of metal surface coating process, it is characterised in that including step:
(1) two close liquid cleaning, using cleaning fluid and pickle be mixed into two close liquid to surface of workpiece carry out degreasing and Derusting, oxide film dissolving;Described two, which close the cleaning agent formula used in liquid cleaning, is:In parts by weight, emulsifying agent 45-50 parts, ooze Saturating agent 8-10 parts, water 20-24 parts;
(2) metal works after two conjunction liquid cleanings are washed twice;
(3) activate, the metal works after washing are subjected to activation process;
(4) metal works Jing Guo activation process are washed twice again;
(5) silane treatment, the metal works after washing will be again passed by and be impregnated into silane treatment agent solution, or by silane Inorganic agent solution spraying, it is coated to surface treated workpiece surface;
(6) toast, the metal works after silane treatment are toasted;
(7) application, to carrying out application through the dried metal works of overbaking;
The parts by weight formula of the silane finish used in the silane treatment be for:20 ~ 30 parts of silane coupler, thickener 20 ~ 30 parts, 5 ~ 7 parts of sodium citrate, 15 ~ 23 parts of pure water;
It is double amino silicane coupling agents to state silane coupler, and the thickener is hydroxyethyl cellulose;
The solution pH value control that the silane finish is configured to is 6.8-7.5;
The concentration of silane finish is 0.2 ‰ in the silane treatment agent solution.
2. a kind of metal surface coating process according to claim 1, it is characterized in that:Metal during the silane treatment Workpiece impregnates or spray time is the 3-5 seconds.
3. a kind of metal surface coating process according to claim 1, it is characterized in that:The baking time is 10-15 points Clock, the baking temperature are 180-200 DEG C.
CN201510580095.3A 2015-09-12 2015-09-12 A kind of metal surface coating process Active CN105088218B (en)

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CN105586587A (en) * 2016-03-25 2016-05-18 大连新锋钢管厂 Hoop surface protection process
CN108031634A (en) * 2017-11-30 2018-05-15 安徽雷萨重工机械有限公司 A kind of sheet metal pretreatment to the coating method
CN109487259B (en) * 2018-12-28 2021-05-14 浙江五源科技股份有限公司 Preparation method of chromium-free silane film before aluminum coil coating
CN113388315A (en) * 2021-04-25 2021-09-14 中国科学院福建物质结构研究所 Graphene/resin composite coating and preparation method of graphene/resin composite coating

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CN100577878C (en) * 2007-09-12 2010-01-06 浙江工贸职业技术学院 Environment-friendly type metal normal temperature surface preservative treatment technique
CN101407917B (en) * 2008-11-24 2010-07-14 夏光甫 High polymer composite synergistic activator
CN103938199B (en) * 2014-04-24 2016-04-06 湖南金裕化工有限公司 Chrome-free film agent and preparation method thereof

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Effective date of registration: 20211202

Address after: 311200 No. 8-3-52, garment market, commercial city, Xiaoshan District, Hangzhou City, Zhejiang Province

Patentee after: Hangzhou yibole Technology Co.,Ltd.

Address before: 310000 Ning Wei Zhen Xin Zhong Cun, Xiaoshan District, Hangzhou City, Zhejiang Province

Patentee before: HANGZHOU XIAOSHAN JINRUN SURFACE ACTIVE MATERIAL FACTORY