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我国机械行业中,广泛地使用亚硝酸钠作为切削冷却液、防锈水、清洗液中的防锈添加剂。而亚硝酸钠是一种有毒害的诱发致癌物质,它可在动物体内形成亚硝基胺,在碱性条件下,与三乙醇胺及二乙醇胺反应生成亚硝基胺化合物。从大量的研究报告中分析,亚硝基胺的致癌性,已构成很大的社会问题。1976年10月美国劳动安全卫生局以通告文件对机械行业发出警告:从水溶性切削液中检测出致癌物质,含量达400-1000PPM。1977年6月日本报纸及电视上以
China’s machinery industry, the widespread use of sodium nitrite as cutting coolant, rust-proof water, rust-proof cleaning fluid additives. Sodium nitrite, on the other hand, is a toxic and carcinogenic substance that can form nitrosamines in animals and react with triethanolamine and diethanolamine to produce nitrosamines under alkaline conditions. From a large number of research reports, carcinogenicity of nitrosamines has constituted a big social problem. October 1976 the US Department of Labor, Health and Safety issued a circular to the machinery industry warned: carcinogenic substances detected from the water-soluble cutting fluid content of 400-1000PPM. June 1977 in Japanese newspapers and television