Common knowledge of coating: three kinds of commonly used internal coating for radiator internal anticorrosion

Core tip: because the current heating system in China is not perfect and standardized in many aspects such as design, equipment quality and management, a considerable part of the heating system has serious corrosion problems, which requires the steel radiator in the system to adopt corresponding anti-corrosion measures to solve the problem of corrosion and water leakage of the radiator itself At present, a common anticorrosion process in the market of our country is internal coating anticorrosion At present, there are three kinds of commonly used interior coating for radiator interior anticorrosion in China: The first type of coating is organic For example, YDR and ty3318 provided by Beijing General Research Institute of non ferrous metals, Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: due to the imperfection and standardization of the current heating system in China due to the design, equipment quality and management, a considerable part of the heating system has serious corrosion problems, which requires the steel radiator in the system to adopt corresponding anti-corrosion measures to solve the problem of corrosion and water leakage of the radiator itself At present, a common anticorrosion process in the market of our country is internal coating anticorrosion At present, there are three kinds of commonly used interior coating for radiator interior anticorrosion: the first one is organic coating For example, YDR type and ty3318 type provided by Beijing General Research Institute of nonferrous metals and most domestic brand radiators in the market choose these two organic coatings This kind of coating is mainly through the isolation, does not let the water contact with the matrix directly to realize the anticorrosion However, the coating and the body are similar to glue bonding (physical bonding), and there are many micropores in the thin coating Water can penetrate into the bonding surface through micropores When the temperature rises, the water begins to expand, the surface begins to bubble, and then falls off With the increase of the service life and the alternation of the cold and hot temperature of the radiator surface, the organism will also appear aging and the coating will peel off, resulting in the direct contact between the substrate and water, and the coating will lose the anti-corrosion protection function, so the life of the radiator will be greatly shortened It is understood that this kind of coating requires the radiator surface to be phosphatized after thorough oil removal, otherwise it will appear "non stick pot" phenomenon (not stick) In order to reduce the micropores in the coating, it is required to carry out two times of coating, and increase the thickness of the coating to more than 50 microns But at present, in order to save cost, most of the manufacturers have omitted some treatment links, the surface treatment can not meet the requirements, and the coating thickness is not more than 30 microns Therefore, there are many radiators with internal coating on the market at present After soaking in hot water for about 5 days, there will be large area of blistering, and the coating will start to peel off You can imagine how its anticorrosion performance will be! The second type is inorganic coating Taking zinc based chromium salts as the representative, the "Zehnder infinite" anticorrosive radiator (this is a super anticorrosive radiator developed by Zehnder R & D center in September 2002 for the nonstandard hot water heating system in view of the current situation of China's heating system) selected this coating The coating is chemically bonded to the substrate at high temperature, which has strong adhesion and is not easy to peel off The process requirements are very strict The coating quality and the pre-treatment effect of radiator surface can be guaranteed only by strictly controlling each process parameter The surface must be treated by multiple strict processes such as oil removal, flushing, coating, curing and cooling to ensure the superiority of zinc chromium coating technology For this reason, Zehnder has invested tens of millions of yuan to build a computer-controlled process parameter assembly line to ensure the corrosion resistance The third type is double coating At present, only Zehnder infinite II anti-corrosion radiator adopts this technology in China Zehnder infinite II anti-corrosion radiator is the upgraded product of "Zehnder infinite" anti-corrosion radiator (MC) II represents "the second generation, double coating and double defense" It adopts the unique double coating technology in China, with more advanced technology, more complex technology and better anticorrosion effect The first coating (silver gray) is zinc chromium inorganic coating, sintered and solidified in an oven above 320 ℃, which is closely combined with the base material, with strong adhesion and will not peel off The second coating (red) is resin organic coating After curing at 180 ℃, the coating can seal the pores that may exist in the first coating and prevent water from penetrating into the substrate surface through pores The two coatings are closely integrated, double-layer protection, so that the radiator has stronger anti-corrosion ability and more safety Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,