Packaging steel strip remission of zinc coating method

Packaging steel strip remission of galvanized layer methods a remission of zinc layer of main chemical solution soaking method, because the zinc zhongzhou easily dissolved in acid solution, so is also used in chemical solution soak acid soak. Artifacts of copper or brass base material force, also can use alkaline solution. Chemical solution soak in addition to the zinc method is simple, easy to operate, low cost, so most of the zinc remission are adopted. But in some kind of special circumstances, also have use electrolytic process, but seldom used. So the electrolytic process formulation seldom. ( 1) Remission chemical method of zinc coating solution formula and technological conditions in the process of chemical immersion, if there is too much the entrainment on the surface of the plating surface active agent, acid will produce more bubbles. In this case, can be 1% 2% nitric acid oxidation defoaming effect. Alkaline solution is mainly used for high carbon steel substrate and remission of galvanized layer elastic parts, to prevent corrosion and penetration of hydrogen, can also be used for copper and copper alloy plate material artifacts of zinc. ( 2) Remission electrolytic process of galvanized layer because of using chemical immersion method has easily remove zinc coating, so rarely by electrolysis, because electrolytic process to add electrolysis device, economically also not worthwhile, so is generally not recommended, but also can be used when necessary. Remission, for instance, a factory in copper, brass, the galvanized layer on the workpiece to adopt the following an electrolytic solution formula and technological conditions.