How is the corrosion resistance of Hex Head Drilling Screw?

1. Material
Stainless steel material: For example, 304 stainless steel contains 18.00%-20.00% Cr and 8.00%-11.00% Ni, which has good corrosion resistance and can resist corrosion in general outdoor environments. It is suitable for ordinary outdoor buildings, furniture, etc. 316 stainless steel has higher corrosion resistance than 304 stainless steel due to the addition of Mo element, and can be used in more severe environments, such as seaside, chemical and other places with strong corrosiveness.
Carbon steel material: Ordinary carbon steel has poor corrosion resistance, but if it undergoes good surface treatment, such as galvanizing, nickel plating, etc., it can also improve corrosion resistance to a certain extent. Hot-dip galvanized Hex Head Drilling Screw has a thicker zinc layer and can provide better anti-rust protection in outdoor environments; nickel-plated screws have better decorativeness and certain corrosion resistance, and are often used in some occasions with high requirements for appearance and relatively good environment.
2. Surface treatment
Electroplating treatment: Common ones include zinc plating and nickel plating. The electroplated zinc layer can provide a certain degree of anti-corrosion ability. According to the different passivation films, it can be divided into white passivation (white zinc), light blue (blue zinc), black passivation (black zinc), military green passivation (green zinc), etc., among which green zinc has relatively good corrosion resistance.
Dacromet treatment: It has good corrosion resistance, heat resistance and weather resistance, and can effectively prevent screws from rusting and corroding in outdoor environments. It is especially suitable for harsh environments such as the seaside and high humidity areas.
3. Application environment
If the Hex Head Drilling Screw is used in a dry indoor environment, the requirements for corrosion resistance are relatively low; in harsh outdoor environments such as humidity, rain, salt spray, or in some industrial environments with corrosive media, screws with higher corrosion resistance are required, such as stainless steel 316 or screws with special surface treatment.
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