Surface treatment method for improving wear resistance and corrosion resistance of austenitic stainless steel shell

Abstract

The invention discloses a surface treatment method for improving wear resistance and corrosion resistance of an austenitic stainless steel shell, which comprises the following steps: sanding the austenitic stainless steel shell with sand paper; deoiling, and washing with water to remove residual deoiling solution; and washing with acid to remove the film, activating the surface, washing with coldwater and preheating, putting the austenitic stainless steel shell in a prepared plating solution to carry out plating for 1-2 hours, taking out, washing with hot water and cold water alternately to remove the residual plating solution on the sample surface, and finally drying to obtain the plating. The invention adopts the chemical plating technique to obtain the good-quality amorphous Ni-W-P ternary alloy plating on the surface of the austenitic stainless steel shell, thereby obviously improving the wear resistance of the product on the premise that the original silvery color and favorable glossiness of stainless steel are ensured.

Description

technical field [0001] The invention relates to a stainless steel surface treatment method, in particular to a surface treatment method for improving the wear resistance and corrosion resistance of an austenitic stainless steel shell, solving the problem that the austenitic stainless steel shell is not wear-resistant and easy to scratch, and at the same time Further improve the corrosion resistance of the product, and maintain the original surface color and glossiness of the stainless steel case, which has been recognized by consumers. Background technique [0002] With the continuous improvement of material living standards, people have higher and higher requirements on the surface of daily necessities and various accessories, which are not only durable but also beautiful. The case materials of various styles of watches currently on the market are mostly austenitic stainless steel. As we all know, austenitic stainless steel has excellent corrosion resistance and can mainta...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the ion plating process itself, such as most of the plating types are cermet films prepared by PVD (Physical Vapor Deposition), the quality of the coating is affected by the target material, vacuum degree, plating material and reaction gas ionization rate. The stress of the coating is relatively large, which makes this technology often show the following shortcomings: first, the color consistency of the coating is poor; second, the porosity of the coating is large, and it cannot play a good anti-corrosion effect on the substrate; Bonding strength is difficult to control and prone to problems

[0007] The traditional electroless coating system is mainly Ni-P binary alloy coating. The structure of this coating is generally a high-phosphorus amorphous structure, and its hardness and wear resistance are higher than those of stainless steel materials. However, it has the following two disadvantages: The first is that the hardness of the Ni-P binary coating is still not high enough, its wear resistance is limited, and the potential difference between the Ni-P binary coating and stainless steel is large, and it is easy to form a corrosion micro-battery in a corrosive medium to accelerate the corrosion process; the second The color of the Ni-P binary coating is yellowish, which cannot meet the requirements of the surface color of the case in this study

[0008] To sum up, although my country has made rapid progress in the application level of watch case coating technology, the quality problems are also very prominent: ①The coating does not have sufficient wear resistance, which is manifested by the short time the watch is worn, premature discoloration of the watch case or Fading; ② The color consistency of the coating is poor and the scrap rate is high, resulting in increased costs and a decline in market competitiveness; ③ The coating adhesion, porosity and other indicators do not meet the requirements, resulting in premature peeling off of the coating, wear and tear, and serious corrosion cause skin allergies etc.

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