A brief introduction to the application of Nichrome plating

1 The application of amorphous structure of nickel-chromium plating layer has different chromium content in the coating layer, and its performance is very different. If the chromium content in the nickel-chromium plating layer reaches a certain content, an amorphous nickel-chromium alloy structure is formed on the surface, which has a higher Corrosion resistance is even better than stainless steel with similar chromium content.

2 Nickel-chromium alloy replaces the metal chromium layer, so that the coating has high high temperature hardness. The chrome layer will soften at higher temperatures. The hardness begins to decrease at 300 ° C, and the 510 ° C coating is fully annealed. In addition, the chrome-plated layer also has an emblem crack structure, which reduces the protection ability to the substrate, and the problem can be solved by replacing the chromium layer with a nickel-chromium alloy.

3 nickel-chromium alloy coating can reduce the amount of stainless steel. The chromium-containing alloy forms a chromium passivation film on the surface to block the immersion of the corrosive medium. When the chromium content of the alloy exceeds 20%, the amorphous film formed on the surface has high corrosion resistance. Depositing a layer of chromium-containing nickel alloy on the surface of the metal material can improve the corrosion resistance of the substrate, thereby reducing the amount of stainless steel and saving nickel-chromium resources.

4 electrodeposited iron chromium nickel ternary alloy to obtain 18Cr-8Ni stainless steel corrosion resistant material. Iron-chromium-nickel alloy coatings are ideal for hardness, anti-tarnishing and corrosion resistance. In order to obtain a ternary alloy similar to stainless steel properties, research has been carried out, such as: current efficiency is only 30% to 40%, the surface smooth thickness is not more than 50μm, and the internal stress is large, which will cause micro cracks on the surface of the coating.

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Label: Coating Nickel-chromium alloy Anti-tarnishing Micro-crack Corrosive medium

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