Recently, many people have asked whether stainless steel, galvanized, and nickel plated screws can be distinguished with the naked eye? Today, the editor will talk to you about distinguishing from the following aspects:
1. Divided by color: 1. Stainless Steel Screws are the primary color of iron and are made of stainless steel material. The color of stainless steel is mainly an alloy of iron and carbon, so the color is close to the color of iron
2. The surface of galvanized screws is galvanized with white zinc, colored zinc, black zinc, etc. Therefore, the colors of galvanized screws are generally white, colored, and black
3. The color of nickel plated screws is related to nickel, usually presenting a very bright silver color
2. Distinguished by magnets: Stainless steel generally does not have magnetism, and stainless steel screws cannot be adsorbed by magnets. Galvanized and nickel plated screws can be adsorbed by magnets.
3. Distinguishing with oxidants: Metal nickel has strong passivation ability, and a thin layer of passivation can be quickly formed on the surface during electroplating. Therefore, the surface of nickel plated screws has a passivation film, while the galvanized surface has a layer of zinc. There is nothing on the stainless steel surface, which can be distinguished with strong oxidants.
4. Distinguished by strong acid and strong alkali: Stainless steel contains chromium and nickel, which have strong corrosion resistance and are not corroded by strong acid and strong alkali. The surface of nickel plated screws has a passivation film, which is slowly corroded by strong acid and strong alkali. Galvanized screws are corroded very quickly
