1 the development trend of cyanide-free zinc plating
From the current status of the technology point of view, completely replaced in the galvanized zinc cyanide has been initially equipped with the relevant conditions. This is because there are many varieties of galvanized steel that can be used to solve the problems that previously could only be solved by cyanide zinc plating. For example, the use of acid zinc plating for rolling galvanized processing, has been very common. The zincate zinc coating obtained has been basically and cyanide zinc showdown. In addition to a small amount of military or special requirements of products, the electroplating industry to achieve cyanide-free zinc plating is the trend of the times.
It should be pointed out that, cyanide-free plating is only to solve the problem of toxic chemicals cyanide-based pollution, not using cyanide plating process can not be sewage treatment. For heavy metal ions or the introduction of some new surfactant effects are governed.
In addition, the introduction of some cyanide-free chemicals, especially some new chromium compounds, some of the environment will bring new problems are not completely concluded, therefore, from the clean production requirements point of view, It is crucial to develop non-cyanide zinc while avoiding new environmental problems.
2 galvanized new technology development and research
Galvanized steel as an anode coating and good protection of steel, which is plating the largest amount of plating. Zinc plating has been used as a protective coating and development of plating species, has been the development and application of zinc additives are also based on the application of protective coating. However, the advent of high-gloss galvanizing additives has expanded the use of galvanizing. In particular, with the coloring technique, it has also been possible to make galvanized decorative surfaces on metal-made surfaces. Therefore, the development of galvanized decorative purposes, in copper, nickel and other non-ferrous metals prices and natural resources shortage of contemporary, is of great significance.
In addition, some of the zinc alloy coatings have excellent surface properties that have led to the development of new areas for galvanized functional applications such as zinc-iron alloys, zinc-nickel alloys and the like, which are of great importance in terms of corrosion resistance. Has been in the automotive industry more state-owned applications. It can be said that in galvanizing the ancient and emerging plating species, there are many processes that can be developed.
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