In industrial automation systems, thermocouple, thermal resistance as a temperature sensor has been widely used, but in some special occasions, such as chemical plants, smelters, power plants and so on, with an ordinary thermocouple, thermal resistance to extreme damage . Thus, in these situations you must use special materials and structure of the thermocouple, thermal resistance¡£
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At present two kinds of wear resistant coating, a material hardness of HRC58-62, temperature range 0-600 ¡æ; corrosion-resistant type coating has good corrosion resistance, in addition to molten lithium, potassium, sodium, hydrofluoric acid, the three Chlorine trifluoride, oxygen trifluoride high velocity liquid nitrogen, but it is almost resistant to all other chemical media, in the range of 0-250 ¡æ long-term use. If made of corrosion-resistant structure to a fixed thread, the thread can not work under pressure¡£
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Titanium alloy water capability, a variety of chloride and hypochlorite, chlorine and wet acid oxidation (including fuming nitric acid) and alkali corrosion, the reduction of pure impatience acid (sulfuric acid, hydrochloric acid), titanium alloy test Temperature range below 500 ¡æ¡£ |
