在气体氮化中为检查炉罐,管路接头是否漏气,一般都用玻璃棒或棉丝灌上工业盐酸的办法检查。盐酸属于强酸,腐蚀性很强,使用中很不安全,而且遇到微量漏气生成白雾不明显。现采用酚酞试纸试漏,具体做法是:用普通白纸浸5～10％的酚酞溶液后,晾干备用。使用时将试纸在清水中浸湿,放在欲检查的地方,如有氨气漏出,白色试纸立即变红,使用这种方法, Nitriding in the gas furnace for inspection, pipeline joints whether leakage, usually with glass rods or cotton irrigation industrial hydrochloric acid way to check. Hydrochloric acid is a strong acid, highly corrosive, very insecure to use, and encountered trace leaks generated white fog is not obvious. Phenolphthalein test strips are now used to try to leak, the specific approach is: ordinary white paper dip 5 to 10% phenolphthalein solution, dry spare. When using the test paper soaked in water, on the place to be checked, if leakage of ammonia, the white test strip turns red immediately, using this method,