Dacromet technology-an epoch-making process for the surface treatment of metal parts

Dacromet is the transliteration and abbreviation of DACROMET (brand name), abbreviated as Dacromet, Dacromet, and Dirkron. Named in China as zinc-chromium coating, it is a new type of anti-corrosion coating with zinc powder, aluminum powder, chromic acid and deionized water as the main components.

Dacromet (also known as Dake rust, zinc chromium film, Dakeman, etc.), that is, flake zinc base road salt micro-coated metal anti-corrosion coating, is a high-tech surface treatment in the world today, and has been recognized by experts Known as a revolutionary product with epoch-making significance in the international surface treatment industry. Steel Duckman technology is still blank in China.

Dacromet coating has a variety of properties. Such as strong corrosion resistance: 7-10 times higher than electro-galvanized; no hydrogen embrittlement: especially suitable for high-strength stressed parts; high heat resistance: heat-resistant temperature of 300 ℃. Especially suitable for high-strength components of motorcycle engine parts. In addition, it also has the advantages of high permeability, high adhesion, high friction reduction, high weather resistance, high chemical resistance stability and no environmental pollution.

The range of substrate materials applicable to Dacromet technology: steel products and non-ferrous metals such as aluminum, magnesium and their alloys, copper, nickel, zinc, etc. and their alloys.

Dacromet technology can replace electro-galvanizing, cadmium electroplating, hot-dip galvanizing, hot-spraying zinc, mechanical galvanizing, zinc-based alloy coating, oxidation, phosphating and other surface protection processes. Excellently put an end to the occurrence of environmental pollution.

Chromium-free zinc-aluminum coatings currently have a handful of products that have achieved industrialization, such as Geomet coatings launched by MCI in the United States, Delta coatings launched by Delta in Germany, and other brands. There are also water-based chromium-free zinc-aluminum coatings in China. At present, the main markets of Geomet are the United States and Japan; the main markets of Delta are some countries in Europe and Asia; the main markets of BNC are Western Europe and Taiwan. The three coatings basically account for more than 95% of the world's chromium-free Dacromet market share.

Dacromet's metal surface treatment method was first born in the 1950s. In North America and Northern Europe, where the winter is cold, the thick ice formed on the roads severely hinders the driving of motor vehicles due to snow. People use the method of sprinkling salt on the ground to lower the temperature of the freezing point of water, dissolve the ice layer, and alleviate the problem of unblocked roads. However, what followed is that the chloride ions in the salt severely eroded the steel body, causing a large number of transportation vehicles to be damaged. To destruction. Therefore, how to protect high-cost driving tools such as cars has become a serious issue for manufacturers.

In order to solve this problem, DiamondShamrock has developed Jinclo metal with excellent salt resistance, and then developed a thin Dacromet coating for metal parts. In 1973, the company and Nippon Oil u0026 Fat Co., Ltd. jointly established Nippon.Darro.shamrock (NDS), and in 1976 established DACKAL in Europe and France. They divided the world market into Asia Pacific, Europe, Africa and America. The market, each responsible for a region, seek common interests on a global scale.