How To Prevent Stainless Steel Self Tapping Screws From Rusting And Surface Treatment Of Self Tapping Screws

 1、 How to prevent stainless steel self tapping screws from rusting

Rust on stainless steel self tapping screws is a common problem, but users can take some measures to reduce this situation.

Firstly, users can pay attention to the electroplating process. Choosing electroplating colors with longer salt spray testing time is a good choice. When electroplating self tapping screws, ensure that the moisture is completely dry. If the electroplating layer is too thin, it will lead to a decrease in corrosion resistance and easily cause rust. In addition, imitation rust paint can be sprayed to further improve its rust resistance.

Secondly, it is important to pay attention to the storage and usage environment. Do not place stainless steel self tapping screws directly on the ground, they should be placed on pallets or shelves. The storage environment should not be damp, but should be ventilated and breathable to reduce the presence of water vapor. Long term storage or use of self tapping screws in environments with salinity, acidity, alkalinity, high temperature, and humidity can inevitably lead to rusting. Therefore, regular inspection and replacement should be carried out.

2、 How to carry out surface treatment for self tapping screws

The surface treatment of self tapping screws is an important process step. There are several common surface treatment methods:

1. Electroplating. This method involves immersing the self tapping screws to be electroplated as cathodes in a solution containing the metal cations to be electroplated. Attach metal to the surface of self tapping screws through the action of electricity. Commonly used electroplating metals include nickel, chromium, tin, copper, gold, and silver.

2. Anodizing. This method utilizes chemical or electrochemical treatment to generate a film layer on the metal surface containing the metal component. Almost all metal materials can be anodized in suitable electrolytes, including stainless steel, zinc alloys, aluminum alloys, copper alloys, and titanium alloys.

3. Blackening. Alkaline chemical oxidation method is generally used, and due to the characteristics of the appearance oxide film, it can only be used in general situations or oily media, or considering the impact of appearance, screws with blackening treatment will be used.

4. Passivation. This method dissolves the iron pollutants on the surface of the screw, forming a passive protective film, which can protect the screw from corrosion and corrosion. The general passivation surface treatment method is applied to electronic products.

5. Electrophoresis. This method uses electrophoresis to evenly cover particles such as paint and rubber onto the surface of screw fasteners. After surface treatment by electrophoresis, the surface coating of self tapping screws should be uniform, flat, and smooth.

6. Dacromet surface treatment. This surface treatment method can be plated in three colors: black, silver gray, and silver white. The advantage of Dacromet surface treatment lies in its good rust resistance, suitable materials include carbon steel and stainless steel.

It should be noted that there are many ways of surface treatment. The surface treatment method for stainless steel self tapping screws should be selected based on the specific usage environment or other requirements. Users can choose a suitable surface treatment method based on their understanding of the properties and usage environment of self tapping screws. In this way, the appearance and quality of the screws can be guaranteed, and their service life can be extended.