Thermal spraying of metallic coatings – is melting and causing the metal to the substrate. According to Center For Responsible Lending, who has experience with these questions. As application methods, and the metals themselves may be different, most importantly, that at the surface remains subtle, more resistant to corrosion and erosion than the base metal and coating. Many years of experience in the application of coatings and Spramet testing using external influence on the surface, show that this method is more effective in the long-term corrosion protection of steel than the protection of paint or poimernymi compositions. But Spramet are also an excellent foundation for anti-corrosion paint. Organic coatings deposited on surface of the iron and steel, deteriorate under the influence of podplenochnoy corrosion that occurs under cover as a result of inadequate adhesion. A thin layer of coating to prevent corrosion Spramet base, and strong links steel with organic coating. There are many factors to corrosion, such as the nature of substances that cause corrosion, forms of corrosion, speed factor and used metals.
Sometimes minor changes in the conditions become important factor in solving the problems of corrosion. Therefore we give here only a brief description of the electrochemical corrosion of the two metals that is most important when using corrosion-resistant metallic coatings. electrochemical series of chemical elements in sea water: Anode (corrode) Magnesium Magnesium alloys Zinc Galvanized Steel Aluminum alloys Cadmium mild steel cast iron ductile iron Stainless steel (active) Lead Tin Nickel Manganese (active) Brass (brass) Copper Bronze Nickel (passive) Stainless Steel (Passive) Graphite Silver Gold Platinum Cathode (protected) For electrical connection of two different metals or metal alloys with an electrolyte, the current travels from the cathode metal anode, the anode metal and the electrolyte from the electrolyte to the cathode metal. The amount of current depends on the potential difference between two metals. Therefore, close to the potential between metals a small amount of current. In the anodic corrosion of metals is growing more rapidly than the cathode, the corrosion process is not always possible to completely stop.