钢铁零件的表面发黑处理,在生产中会经常碰到,以前大多使用高温氧化处理工艺,生产周期长,能耗大(需在140℃以上处理30～90分钟),环境污染严重,生产工人劳动条件差等缺陷,限制了发黑处理的应用。 NB-1常温发黑剂克服了上述的缺点,它具有不需加热,可大量节约能源,发黑处理时间只需2～5分钟,生产效率高,操作方便,不需特殊设备,无亚硝 Blackening the surface of steel parts, often encountered in production, before the use of high temperature oxidation process, long production cycle, energy consumption (to be more than 140 ℃ for 30 to 90 minutes), serious environmental pollution, production workers Poor working conditions and other defects, limiting the application of black processing. NB-1 room temperature blackening agent to overcome the above shortcomings, it has no heating, can save a lot of energy, black processing time is only 2 to 5 minutes, high production efficiency, easy operation, no special equipment, no nitrite