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加压氯胺法制水合肼的生产是采用改装的3DT—2/150型柱塞泵将10％左右的次氯酸钠加热至40公斤/厘米~2后再进行合成反应的。次氯酸钠极不稳定,遇热易分解放出原子氧。因此,次氯酸钠具有很强的腐蚀性。10％左右的次氯酸钠溶液对碳素钢、18—8不锈钢、锡青铜的腐蚀速度都大于1.27毫米/年。如北京某制药厂水合肼装置,输送7％次氯酸钠的加压泵进、出口阀弹簧采用碳素钢材质,使用一个月就失去了弹性。
Pressurized chloramine hydrazine hydrazine production is the use of modified 3DT-2/150-type piston pump about 10% sodium hypochlorite heated to 40 kg / cm ~ 2 before the synthesis reaction. Sodium hypochlorite is very unstable, hot and easy to decompose and emit atomic oxygen. Therefore, sodium hypochlorite is highly corrosive. About 10% of the sodium hypochlorite solution of carbon steel, 18-8 stainless steel, tin bronze corrosion rate is greater than 1.27 mm / year. Such as a pharmaceutical plant in Beijing hydrazine hydrate, delivery of 7% sodium hypochlorite pressurized pump inlet valve spring carbon steel, use a month to lose flexibility.