论文部分内容阅读
有色金属铸件有泄漏缺陷时,可用浸渍电木清漆的办法来修补。浸渍用的电木清漆,通常是用甲酚(石炭酸)50%,甲醛(福尔马林)50%,外加少量的氨水配成。根据使用经验证明,这种浸渍材料的液体的比重必须在0.95～1.03范围内,效果才最好。但是电木清漆液使用过一个时候以后,浓度就加大了,如果比重大于1.03时,就应加入精馏酒精来稀释,以保证铸件修补的质量。
Non-ferrous metal castings have leak defects, can be impregnated with bakelite varnish approach to repair. Dipping varnish used, usually with cresol (carbolic acid) 50%, formaldehyde (formalin) 50%, plus a small amount of ammonia dubbed. According to the experience of use, it is proved that the specific gravity of the liquid of impregnating material must be in the range of 0.95 ~ 1.03, the effect is the best. But Bakelite varnish liquid used after a while, the concentration has increased, if the proportion is greater than 1.03, it should be added to dilute the distillation of alcohol to ensure the quality of casting repair.