Galvanizing is the practice of coating clean, oxide-free iron or steel with a thin layer of zinc or zinc alloy to protect the surface against corrosion. The hot dip process is adaptable to coating nearly all types of fabricated and non-fabricated products such as structural assemblies, hardware chain, hollow ware, wire, pipes and tubes, fittings, tanks, sheets, strip, and wire cloth.
Galvanizing consists of four fundamental steps:
(1) Surface preparation
(2) Fluxing
(3) Galvanizing
(4) Finishing
Temperature measurement after dipping strongly influences the final appearance and quality of coating. It also enhances the maximum line speed. There are number of reasons for the non-uniform appearance. A steel part with both dull and shiny coating can also be the result of a different cooling rate. The use of a rapid quench after dipping can stop the formation of the gray or alligator coating. The phenomenon of peeling can also be seen if work cools too slowly, such that the temperature remains above 288°C for periods over 10 or 15 minutes, the pure zinc layer may peel off of the work.
Recommended Product for the application
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