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14
2020
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08
What is the difference between chrome plating, nickel plating, and zinc plating?
Author：
Firstly, let's understand what electroplating is
Electroplating is the process of using the principle of electrolysis to deposit a thin layer of other metals or alloys on certain metal surfaces. It is a process of using electrolysis to attach a layer of metal film to the surface of metal or other material parts, thereby preventing metal oxidation (such as rust), improving wear resistance, conductivity, reflectivity, corrosion resistance (such as copper sulfate), and enhancing aesthetics.
Electroplating is divided into specific processes such as copper plating, gold plating, silver plating, chromium plating, nickel plating, and zinc plating, and is particularly widely used in the manufacturing industry for zinc plating, nickel plating, and chromium plating. And there must be some difference between these three, right?
01 Galvanized
Definition: Galvanization refers to the surface treatment technology of coating a layer of zinc on the surface of metal, alloy or other materials for aesthetic and rust prevention purposes.
Features: Low cost, average corrosion resistance, silver white color.
Applications: Screws, circuit breakers, industrial supplies, etc.
02 Nickel plating
Definition: The method of depositing a layer of nickel on a metal or some non-metal by electrolysis or chemical methods is called nickel plating.
Features: Beautiful, can be used for decoration, high price, slightly complex craftsmanship, color is silver white with a hint of yellow.
Applications: energy-saving lamp heads, coins, hardware, etc.
03- Chrome plating
Definition: Chromium is a bright white metal with a slight blue color, which is deposited on a metal or some non-metal by electrolysis or chemical methods, known as chrome plating.
Features: There are two types of chrome plating. The first is for decorative purposes, with a bright appearance and good wear resistance. Its rust prevention ability is not as good as galvanizing, but better than oxidation; The second method is to increase the hardness, wear resistance, etc. of metal parts, which is the functionality of the parts.
Application: Bright decorative parts, tools, faucets, etc. on household appliances, electronics, and other products.
As for the most basic differences among the three types of electroplating
1. Chromium plating mainly improves surface hardness, aesthetics, and rust prevention. Chromium coating has good chemical stability and does not act in alkali, sulfide, nitric acid, and most organic acids, but can be dissolved in hydrogen halide acids (such as hydrochloric acid) and hot sulfuric acid. Because chromium does not change color, it can maintain its reflective ability for a long time and is superior to silver and nickel. The process is usually electroplating.
2. Nickel plating is mainly for wear resistance, corrosion prevention, and rust prevention. It is generally thin in thickness and can be divided into electroplating and chemical processes.
3. Galvanizing is mainly for aesthetic and rust prevention purposes. Zn is an active metal that can react with acids, so its corrosion resistance is poor and it is the cheapest among the three.
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