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Why does the tin barrel need to be galvanized?

2021-01-06 361

Many friends in the process of using the iron bucket, will find that the appearance of the iron bucket is galvanized, so, do you know why the iron bucket is galvanized? Let's see the detailed introduction of Xiaobian.

Barrel manufacturers think that zinc: zinc soluble in acid, but also soluble in alkali, so it is called amphoteric metal. Zinc hardly changes in dry air. In humid air, a fine basic zinc carbonate film will be formed on the surface of zinc. In the atmosphere containing sulfur dioxide, hydrogen sulfide and marine, the corrosion resistance of zinc is poor, especially in the atmosphere containing organic acid at high temperature and high humidity.

江門(mén)外貿(mào)鐵皮桶

The standard electrode potential of zinc is -0.76v. For steel substrate, zinc coating belongs to anodic coating, which is mainly used to avoid corrosion of steel. Its protective function is closely related to the thickness of coating. The protective and decorative properties of zinc coating can be significantly improved after passivation, dyeing or coating with light protecting agent.

The principle of galvanizing process: in a rotating barrel with plating parts, glass balls, zinc powder [color business opportunities: zinc powder standard], water and additives, the glass ball as the impact medium rotates with the barrel, conflicts with the surface of the plating parts and generates mechanical and physical energy by hammering. Under the effect of chemicals, the coated zinc powder is "cold welded" to the surface of the plating parts to form lubrication, uniformity and stability As thick as possible.

Article source: Jiangmen foreign trade iron bucket http://30004000.cn/


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