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What is galvanizing?

What is galvanizing?

Zinc plating refers to a surface treatment technology that coats a layer of zinc on the surface of metals, alloys or other materials for aesthetics and rust prevention. The main method used is hot-dip galvanizing. Relevant scholars and experts pointed out that hot-dip galvanizing is a traditional industry. In today's situation of overcapacity and increasing environmental protection, it is necessary to increase technological innovation, actively promote common technologies, and use Internet technology to promote the construction of smart factories. Research and promote waste gas, waste liquid,

 waste slag collection and treatment technology, energy saving and emission reduction technology, corrosion-resistant materials and alloys. Speed ??up the formulation of industry standards and use standards to regulate the market. Create a good environment for the continuous development of the hot-dip galvanizing industry. Zinc is soluble in acids and alkalis, so it is called an amphoteric metal and hardly changes in dry air. In humid air, a dense basic zinc carbonate film will be formed on the zinc surface. In atmospheres containing sulfur dioxide, hydrogen sulfide, and marine atmospheres, zinc has poor corrosion resistance, especially in high-temperature and high-humidity atmospheres containing organic acids, zinc coatings are easily corroded. The standard electrode potential of zinc is -0.76V. For the steel substrate, the zinc coating is an anodic coating. It is mainly used to prevent the corrosion of steel. The quality of its protective performance is closely related to the thickness of the coating. After the zinc coating is passivated, dyed or coated with a light protectant, its protective and decorative properties can be significantly improved.

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