Large galvanized wire is a commonly used coating of iron and steel products, but there are a variety of galvanizing processes can be used. How to choose galvanizing technology and galvanizing additive, want to see a product to have what requirement to make a piece. Only in view of the design requirements of the product and the characteristics of the product itself, according to the situation of different galvanizing process to meet the requirements of the product to choose the relevant galvanizing process.
For general protection coating, alkaline zincate zinc plating color passivation process can be used. Sometimes in order to match the color of the product, you can also use blue and white passivation process, such as military green passivation, black passivation and so on. For some galvanized after the need for deformation of the installation of processing parts, to use low brittle galvanized process, not to brightness requirements, so as to reduce the amount of bright additives.
To regard as the galvanizing that bake lacquer kind paint ground floor, because have paint drying or solidify process, zinc acid salt galvanize or chloride galvanize the galvanizing agent with more dosage is unfavorable to use. And choose cyanide zinc plating or low – brittle zinc – plating process. Otherwise, in the case of temperature higher than 160℃, sometimes there will be coating bubbling phenomenon. For standard parts and other small parts suitable for rolling plating, it is appropriate to choose bright zinc plating potassium chloride. This coating has good brightness and high current efficiency. The disadvantage is that the passivation performance is slightly worse, but it is enough to meet the requirements of the product.
For wire plating with higher requirements on deposition speed and current efficiency, sulfate galvanizing process can be used. Compared with the old sulfate galvanized, the current sulfate galvanized because of the use of brightening agent technology, can obtain bright coating effect, showing a good protective and decorative effect on the wire. Zinc sulfate is also suitable for castings and other iron and steel products due to rough surface or large surface area.
Post time: 20-12-21