Metal material with excellent corrosion resistance
A metal material and underlying metal technology, applied in the direction of metal material coating process, metal layered products, layered products, etc., can solve the problem that the corrosion resistance is difficult to fully meet the requirements of practical applications, and achieve excellent corrosion resistance, good The effect of lubricity and good machinability
Inactive Publication Date: 2017-08-11
祝军
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Problems solved by technology
Therefore, in recent years, the development and production of chromium-free passivation solutions have become more and more popular in the world. Among the existing chromium-free passivation solutions, there are mainly zirconium passivation solutions, titanium salt passivation solutions, and phosphate pseudo-conversion solutions. Passivation solution, etc., but they are difficult to fully meet the practical application requirements in terms of corrosion resistance
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Embodiment 1
[0017] This embodiment provides a metal material with excellent corrosion resistance. As an example, in this embodiment, No. 45 steel is used as the underlying metal, and a zinc phosphate film layer is formed by a conventional phosphate treatment method, and the The adhesion amount of the zinc phosphate film layer is 20g / m 2 ; Then the underlying metal formed with a phosphate film is immersed in a passivation solution, wherein the temperature of the passivation solution is 80° C., and the treatment time is 4 to 6 minutes; the adhesion amount of the formed passivation film is about 5g / m 2 . The only difference between the samples and the comparative samples is the composition and / or content of the passivation solution.
[0018] Table 1 shows the composition of the passivation solution used in each sample (A1-A2) and comparative samples (B1-B6).
[0019] The composition of table 1 passivation solution
[0020]
[0021] For each sample and comparative sample, its corrosio...
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Abstract
The invention relates to a metal material with excellent corrosion resistance. The metal material is provided with an underlying metal, and a phosphate film layer is formed on the material surface of the underlying metal; a passive film layer is formed on the phosphate film layer, and the passive film layer is formed by immersing the underlying metal with the phosphate film layer formed in a passivating solution; the passivating solution comprises the following materials in percentage by weight: 2.5%-3.0% of nitrilotrimethylene triphosphonic acid, 1.2%-1.5% of zinc aluminum tripolyphosphate, 0.5%-0.8% of boric acid, 1.2%-1.5% of citric acid and the balance of deionized water. The metal material disclosed by the invention is provided with a compact passive film protection layer with higher corrosion resistance and has good lubricity, thereby ensuring good processability and keeping excellent corrosion resistance.
Description
technical field [0001] The invention relates to the technical field of metal materials, more specifically, the invention relates to a metal material with excellent corrosion resistance. Background technique [0002] Corrosion of steel materials occurs all the time. According to statistics, about 10% of steel products cannot be recycled each year due to corrosion. In order to prevent corrosion and reduce the huge loss caused by corrosion of steel materials, various anti-corrosion methods must be adopted. Hot-dip galvanizing treatment on the surface of steel is a commonly used treatment method. However, for galvanized sheets, surface passivation treatment is usually required. The traditional passivation treatment is mainly hexavalent chromium passivation based on chromate. Chromate passivation has the advantages of good corrosion resistance of passivation film, mature technology, low cost, simple operation, beautiful appearance and self-healing ability, etc., and has become...
Claims
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IPC IPC(8): C23C22/23B32B15/04
Inventor 祝军
Owner 祝军