Surface-treating agent, process for manufacturing plated steel sheet using surface-treating agent, and plated steel sheet
A technology of surface treatment agent and steel plate, which is applied in the field of surface-treated plated steel plate and environment-adaptive surface treatment agent, which can solve the problems of poor storage stability, unstudied solvent resistance and coating performance, and unstudied alkali corrosion resistance processing Solve the problems of corrosion resistance, solvent resistance, etc., and achieve the effect of excellent paintability and storage stability
Active Publication Date: 2013-12-25
JFE STEEL CORP
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Problems solved by technology
According to this technology, although a film excellent in corrosion resistance and fingerprint resistance can be obtained, the corrosion resistance after alkali degreasing, the corrosion resistance of the processed part, and the solvent resistance have not been studied, that is, these characteristics cannot be obtained sufficiently.
Patent Document 15 discloses a surface treatment agent containing at least one water-based resin selected from cationic and nonionic properties, a specific resin compound, a metal compound containing a specific metal, and water, but also did not study alkali resistance, processed parts, etc. Corrosion resistance, solvent resistance, that is, these characteristics cannot be obtained sufficiently
Patent Document 16 discloses a technique of using a surface treatment agent containing cationic urethane, cationic phenolic polycondensate, titanium, and a specific metal-containing compound in a specific ratio, but did not study solvent resistance and paintability. i.e. these properties are insufficient
[0013] In addition, the prior art surface treatment agents containing silane coupling agents all tend to have poor storage stability
Therefore, even if there is no problem in the appearance of the surface treatment agent after storage, the desired characteristics cannot be obtained in many cases, and the above-mentioned problems have not been addressed in the prior art.
Method used
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[0095] Properly mix the resin compound (A) shown in Table 1 (Table 1a and Table 1b), the urethane (B) shown in Table 2, the silane coupling agent (C) shown in Table 3, and the silane coupling agent (C) shown in Table 4. The titanium compound (D), the vanadium compound (E) shown in Table 5, and the wax (W) emulsion in Table 6 were used to prepare a surface treatment agent. For example, the surface treatment agent of Example 1 is mixed in a manner to achieve the composition of Table 8, adjusted to the pH shown in Table 8 with acetic acid and ammonia water, and then prepared with deionized water, so that 110 ° C × 2 hours The dry solid content was 10% by mass. Regarding other surface treatment agents, all were adjusted to pH with acetic acid and ammonia water, and prepared so that the dry solid content was 10% by mass. In addition, as the above-mentioned deionized water, ion-exchanged water having a conductivity of 10 μS / cm was used.
[0096] The plated steel sheets shown in Ta...
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Abstract
Provided are a chromium-free surface-treatment agent that allows for the formation of a film on a surface of a metal material, the film being excellent in terms of corrosion resistance in bent portions of steel sheets, solvent resistance, and paintability after alkaline degreasing, and that has excellent storage stability in the state of a one-component agent; a method for producing a coated steel sheet using the surface-treatment agent; and a coated steel sheet. A surface-treatment agent containing a resin compound having a specific bisphenol skeleton, a cationic urethane resin emulsion, a silane coupling agent, an organic titanium chelate compound, a tetravalent vanadyl compound, and water, with predetermined proportions and having a pH of 4 to 5; a method for producing a coated steel sheet using the surface-treatment agent; and a coated steel sheet.
Description
technical field [0001] The present invention relates to a surface treatment agent for plated steel sheets suitable for use in automobiles, home appliances, and building materials, and particularly relates to an environment-friendly surface treatment agent that does not contain chromium at all during and during production, and production of plated steel sheets using the treatment agent method, and a surface-treated plated steel sheet. Background technique [0002] In steel sheets for home appliances, steel sheets for building materials, and steel sheets for automobiles, chromic acid and heavy chromium have been widely used to improve the corrosion resistance (white rust resistance, red rust resistance) of the surface of galvanized steel sheets. A steel plate subjected to chromate treatment with a treatment solution mainly composed of acid or its salts. This chromate treatment is an economical treatment method that is excellent in corrosion resistance and can be performed rel...
Claims
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IPC IPC(8): C23C22/40
CPCC09D5/024C09D175/04C09D5/086C08G2150/90C23C2222/20C23C22/40C09D5/12Y10T428/31678C23C22/05
Inventor 藤林亘江安藤聪
Owner JFE STEEL CORP