吐温40及其复配缓蚀剂在原油模拟液中对20号碳钢的缓蚀性能研究

通过采用失重法、CMB-4510A缓蚀剂快速评定仪、极化曲线法和交流阻抗法研究了在酸性体系溶液中吐温40、硫酸锌、葡萄糖酸钠三种缓蚀剂单独使用及以吐温40为主的二元复配体系对20号碳钢在酸性体系中的缓蚀效果。实验结果表明:温度为30℃,p H值为4时,吐温40可以很好地抑制20号钢的腐蚀;而且吐温40与硫酸锌、葡萄糖酸钠的复配缓蚀剂具有良好的增效作用。

Synergistic extraction of zinc from ammoniacal solutions using a β-diketone mixed with trialkylphosphine oxide

A simple comparative study of synergistic extraction of zinc from ammonium sulfate and ammonium chloride systems with mixtures of Mextral54-100 and tri-nalkylphosphine oxide(TRPO) dissolved in n-heptane was described. Various parameters affecting the extraction process were investigated. Experimental results show that extraction from ammonium sulfate is better than that from ammonium chloride under the same conditions owing to the additional complexation between zinc and chloride ions. Total ammonium concentration and pH have a significant effect on zinc extraction efficiency because of the formation of zinc ammine complexes. The synergistic effect is explained by the formation of adduct between zinc chelates and trialkylphosphine oxide. The thermodynamic data show that the extraction reaction is exothermic and stripping is endothermic. Infrared(IR) spectra of the zincloaded organic phases were also examined.

光亮添加剂在硫酸盐电镀锌钢丝生产中的应用

介绍采用硫锌-30或硫锌-40为光亮添加剂的硫酸盐电镀锌的生产工艺参数,镀液各组分的作用,镀液的维护,常见的故障处理和光亮添加剂在使用过程中的注意事项。给出光亮镀锌工艺参数:硫酸锌为450～550 g/L,硼酸为20～30 g/L,pH为3.0～5.0,镀液温度10～60℃,光亮剂为16～20 mL/L,阴极电流密度10～45 A/dm2。和传统硫酸盐单盐镀锌工艺相比,光亮电镀锌工艺具有成分简单、稳定易维护、沉积速度快、电耗低,镀层细致光亮,耐蚀能力强等优点,适合生产表面光洁度要求高的商品钢丝。