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在炼油、石油化工、化工、发电、轻纺工业、冶金等工业生产过程自动控制过程中,需采用各种自动控制仪表,其中各类变送器是用于测量相转換传输标准信号给其它自控仪表,变送器的测量元件直接与被测介质接触,因此,耐蚀问题是必须解决的重要课题。本章中把各种腐蚀性介质大致归成四类,其中还原性酸类如盐酸,醋酸及盐以及氯气等腐蚀介质的腐蚀情况特别严重。文章介绍这类介质中使用的变送器系
In the oil refining, petrochemical, chemical, power generation, textile industry, metallurgy and other industrial processes of automatic control, the need to adopt a variety of automatic control instruments, including various types of transmitters is used to measure the standard phase shift signal transmission to other Automatic control instruments, transmitters and measuring elements directly in contact with the measured medium, therefore, corrosion resistance is an important issue that must be addressed. In this chapter, all kinds of corrosive media are generally classified into four categories, of which corrosive media such as hydrochloric acid, acetic acid and salt and chlorine gas are particularly corrosive. The article describes the type of transmitter used in this type of media