How to distinguish between stainless steel screws, galvanized and nickel-plated screws?
Time:
Nov 13,2023
In recent times, many people have asked, can stainless steel, galvanized, and nickel-plated screws be distinguished by the naked eye?Today Xiaobian will talk to you about distinguishing from the following aspects：
In recent times, many people have asked, can stainless steel, galvanized, and nickel-plated screws be distinguished by the naked eye?Today Xiaobian will talk to you about distinguishing from the following aspects：
one.Divided by color：
1. Stainless steel screws are the primary color of iron and are made of stainless steel. 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., so the color of galvanized screws is generally white, color, and black.
3. The color of nickel-plated screws is related to nickel, and it generally presents a very bright silver color.
two.Distinguish by magnets: Stainless steel is generally not magnetic. Stainless steel screws cannot be adsorbed by magnets. Galvanized and nickel-plated screws can be adsorbed by magnets.
three.Distinguish by oxidant: Metal nickel has a strong passivation ability. When electroplating, a thin layer of passivation can be quickly generated on the surface. Therefore, the surface of nickel-plated screws has a passivation film, the galvanized surface is a layer of zinc, and the stainless steel surface has nothing. It can be distinguished by a strong oxidant.
four.Distinguish by strong acid and alkali: stainless steel contains chromium and nickel, has strong anti-corrosion properties, and is not corroded by strong acid and alkali. The surface of nickel-plated screws has a layer of passivation film, which is slowly eroded by strong acid and alkali, and galvanized screws are corroded faster.
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