The use of brighteners in metal finishing processes, especially in potassium chloride galvanizing, is essential for achieving high-quality, attractive coatings. Brighteners not only significantly improve the gloss of the coating, but also its microstructure, which affects the overall properties of the coating.
Potassium chloride galvanizing brightener usually contains active organic compounds, such as dopamine, polyether compounds, and some organic molecules containing sulfur atoms, these compounds can form a dense layer of active organic film on the cathode surface. The film acts in the growth process of the coating, can effectively regulate the reduction speed of metal ions, promote the uniform deposition of zinc ions, to avoid the local premature generation of large grains, and ultimately lead to a smooth, detailed coating surface and have a mirror effect.
However, the use of potassium chloride galvanizing brighteners is not without limits. Excessive amounts of brightener may cause cracking or brittleness of the coating, and excessive organic substances may form an irreversible contamination film on the cathode, preventing the normal growth of the coating. On the other hand, a brightener with too much sulfur content may lead to an increase in the sulfur content of the plated layer, affecting the chemical stability and corrosion resistance of the plated layer. Therefore, adding brighteners diligently and sparingly is an indispensable part to ensure the quality of the plated layer.
During the production process of using Bigely potassium chloride zinc plating brightener, continuous monitoring and maintenance of the brightener concentration, regular analysis of the composition of the plating solution and the nature of the plating layer, as well as timely adjustments and replenishment of the brightener, so as to make the plating layer crystallized and detailed, white and bright plating layer, as well as to ensure that the production line is stable operation.
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