一种通过臭味剂提示泄漏的乙二醇载冷剂

An Ethylene Glycol Refrigerant with Leakage Detection by Odorant Indicator

以51%乙二醇水溶液为基础,苯甲酸钠、磷酸氢二钠、苯并三氮唑、三乙醇胺、钼酸钠为复合缓蚀剂,四氢噻吩为泄漏提示剂,通过磷酸调节溶液体系pH值,组成某环境风洞换热系统载冷剂。参考发动机冷却液试验方法,安排正交实验,测定了载冷剂腐蚀性和泡沫倾向。自定了臭味指示能力测定方法,确定了厂房内四氢噻吩用量与察觉时间关系。实验结果显示,该载冷剂对铜、低银铜磷焊料、黄铜、钢、OCr18Ni9不锈钢和铸铝具有优秀的防腐缓蚀性能,泡沫倾向性小,各项指标均优于NB/SH/T0521标准要求,添加的臭味剂能够在厂房内及时有效的提示泄漏。

The refrigerant used for heat exchange system of an environmental wind tunnel was constituted on the basis of 51%ethylene glycol solution,and sodium benzoate,disodium hydrogen phosphate,benzotriazole,triethanolamine,sodium molybdate were added as compound corrosion inhibitor,while tetrahydrothiophene as Leakage Detection.The pH value of refrigerant could be adjusted by phosphoric acid.The experimental method of engine antifreeze fluid was used for reference,and the corrosivity and foaming tendencies were measured through orthogonal experiment.The relationship between dosage of tetrahydrothiophene and detection time was confirmed by the measuring method of odorant detection capacity which was self-developed.The results of experiment indicated that this refrigerant had high anti-corrosion performance on copper,low-silver copper-phosphorus filler,brass,steel,OCr18 Ni9 stainless steel,cast aluminum,and it also has low foaming tendency.Each index was better than the requirement of standard NB/SH/T0521,and the leakage could be warned by the odorant effectively.