What is the progress of the new chromium-free passivation technology in the field of electroplated zinc?
Release time:
2023-03-16 10:06
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What is the progress of the new chromium-free passivation technology in the field of electroplated zinc? Electroplating is also one of the most commonly used technologies for metal corrosion resistance. Chromium-free passivation treatment is a type of chemical technology. It is a process that transforms the surface of metals or coatings from an active state to a passivated state through chemical or electrochemical means. So let's take a look at the progress of the new chromium-free passivation technology in the field of electroplated zinc.
Electroplated zinc is currently widely used in many fields such as shipbuilding, machinery, aviation, and construction.
In recent years, China's economy has developed rapidly, and galvanized steel sheets are one of the fastest-growing steel varieties in domestic consumption.
Due to the relatively negative electrode potential of zinc, when galvanized steel parts are eroded by corrosive media, zinc, as the anode, corrodes first, protecting the iron substrate. Therefore, galvanizing is a simple and effective method to improve the corrosion resistance of steel.
Due to the relatively active nature of zinc, especially in unventilated humid environments, the galvanized layer, as the anode, is easily corroded, forming dark gray or white loose corrosion products, which greatly weakens the corrosion resistance of the galvanized layer. Over time, red rust may also appear, thus losing its anti-corrosion effect. To improve the corrosion resistance of the galvanized layer, it is generally necessary to carry out appropriate chromium-free passivation treatment on the galvanized layer to enhance its thermodynamic stability in the environment.
After the galvanized layer undergoes chromium-free passivation treatment, it can not only significantly improve the corrosion resistance of the galvanized layer but also enhance the aesthetic appearance of the galvanized parts. Therefore, the chromium-free passivation process for galvanized layers is widely applied in many fields such as machinery, electronics, instrumentation, and light industry.
New technology, galvanizing, passivation, corrosion, improvement, treatment, corrosive, field, chemistry, one of
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2024-09-20
2023-03-16
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