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化工通用机械一般指容器、换热器、压缩机、冷冻机、泵、阀、离心机等。由于化工通用机械往往接触各种腐蚀性的化工介质,因而耐蚀性是化工通用机械的重要技术要求之一。据国外统计,化工设备因腐蚀而引起的破坏事故常超过其整个设备事故的一半。据日本、英国等的统计,在国民经济的直接腐蚀损失中化工占13～15%左右。一、腐蚀特点1.许多类型机械的腐蚀实际上主要是防锈问题,而化工通用机械除接触化工大气、防锈要求更高外,还接触各种各样的强
General chemical general machinery containers, heat exchangers, compressors, freezers, pumps, valves, centrifuges and so on. As chemical general machinery is often exposed to a variety of corrosive chemical media, corrosion resistance is one of the important technical requirements of chemical general machinery. According to foreign statistics, chemical equipment due to corrosion damage caused by more than half of its total equipment accidents. According to the statistics of Japan, Britain and other countries, chemical industry accounts for about 13-15% of the direct corrosion loss in the national economy. First, the corrosion characteristics 1. Many types of mechanical corrosion is actually mainly rust-proof problems, and chemical general machinery in addition to contact with the chemical atmosphere, rust-proof requirements higher, but also exposed to a variety of strong