Due to the more and more common use of some joint products in the market, the working conditions of tee-type pipe joint suppliers are becoming more and more complicated and strict, and customers' requirements for anti-rust treatment and anti-corrosion of joints are also getting higher and higher. Naturally, this is also the regulation of the sales market, as well as the development trend of the joint product itself and the long-term evolution. Today, everyone will grasp the evolution history of joint surface treatment.
Gradually, suppliers of stainless steel pipe joints have not clearly existed in the market. At the beginning, the traditional carbon steel joint was applied with the surface treatment method of "phosphating and oiling". It is a very initial method to avoid corrosion of the joint by applying oil. , This type of surface treatment is also widely used in China's national standard joints, such as JB-988 series products, which are also known as black joints.
In the future, for better anti-corrosion, beautiful appearance, etc., the supplier of non-standard pipe joints has developed a color galvanizing process. Color galvanizing has the following advantages: a coating of at least 8μm, which significantly improves its anti-corrosion work ability; It is usually impossible to prevent scratches or scratches during the installation process, and the hot-dip galvanized layer is a kind of negative anti-corrosion maintenance for the carbon steel joint body, which can avoid the corrosion and damage of the joint part. However, there is a lot of hexavalent chromium in the processing technology of color galvanizing, which has the risk of carcinogens when touched or inhaled in the long term or in the short term. Then came the last link of the joint development trend. In order to be more resistant to corrosion, white zinc plating came out. White zinc is more beautiful and elegant, and the corrosion resistance level is twice that of color zinc. At this stage, white zinc joints with trivalent chromium are currently used on the market.