Heat exchanger gasket in developed countries. Scientific research institutions pay special attention to the research and development of environmental protection technology. In developed countries, scientific research institutions pay special attention to the research and development of environmental protection technology. A large number of high-tech enterprises represented by meijiahua international have launched relevant new technologies in recent two years. International attention has been paid to the new technology of environmental cleaning agent. At present, China is gradually approaching the new technology of environmental cleaning agent . Comparison between heat exchanger pickling and environmental cleaning agent (this paper takes forstec as reference) (I) metal corrosive pickling for heat exchanger The central air conditioning and other heat exchange equipment will inevitably cause corrosive damage, especially hydrogen permeation damage, which will cause the metal crystal structure to be damaged. When the damage is serious, hydrogen embrittlement and hydrogen induced crack will cause potential danger to the safe operation of heat exchange equipment. The environmental cleaning agent adopts biodegradable biological acid. The metal corrosion rate measured by the national authority is only 1 / 20  or even lower than that of metal in water. It is one percent of the corrosion rate of metal in acid cleaning. Even the detergent solution does not damage the skin（ 2） Cleaning effect: the cleaning personnel fear the equipment damage caused by acid corrosion during the pickling process. Therefore, they dare not wash for a long time. It is easy to cause incomplete cleaning. Although certain cleaning effect is achieved, the scale problem will be generated soon. Besides relying on its own advantages of no corrosion, the scale dissolving efficiency of FST environmental cleaning agent is very high. The scale removal rate of 4 kg per kilogram of raw liquid can be removed. Most cleaning work only takes 2-3 hours to complete the cleaning efficiency（ 3） Toxicity and environmental impact the toxicity of acid cleaning waste liquid due to its acid corrosiveness and corrosion inhibitor decomposition is very harmful to biological environment. Pickling is toxic and harmful and high pollution cleaning. The main components of fosteik are advanced biological preparations, so it can be biodegraded and non-toxic, non-toxic, corrosion-free and non flammable, such as no harmful substances in the scale, and the cleaning waste liquid can be discharged directly（ 4） Cleaning method pickling has corrosion effect on metal. Operators must be trained strictly. If improper operation is not done, it is easy to cause serious damage to equipment or even scrap.