低泡沫环氧丙烷封端脂肪酸甲酯乙氧基化物在铝材低温除油中的应用

Application of low-foaming propylene oxide terminated fatty acid methyl ester ethoxylate to degreasing of aluminum at low temperature

以环氧丙烷(PO)封端脂肪酸甲酯乙氧基化物(FMEE)为主成分,TX-10为乳化剂,乙二胺二邻苯基乙酸钠(EDDHA-Na)为螯合剂,伯烷基磺酸钠(PAS-80)为渗透剂,获得适用于铝材的低温乳化、除灰、防回沾三种性能均衡的除油剂。通过正交试验确定了PO封端FMEE、TX-10、PAS-80、EDDHA-Na的较佳质量比为3∶2∶1∶1。将30g/L该除油剂与10g/L硫酸复配使用时,不仅可获得良好的除油效果,还能降低硫酸的使用量。

A degreaser having the functions of low-temperature emulsifying, desmutting, and anti-staining for aluminum was prepared based on propylene oxide(PO) terminated fatty acid methyl ester ethoxylate(FMEE) with TX-10 as emulsifier,sodium ethylenediamine-di-o-hydroxyphenylacetate(EDDHA-Na) as chelator, and sodium primary alkane sulfonate(PAS-80) as permeating agent. The mass ratio of PO-terminated FMEE to TX-10 to EDDHA-Na to PAS-80 was optimized as 3:2:1:1 by orthogonal test. The degreaser had excellent degreasing effectiveness if being used at a mass concentration of 30 g/L in combination with 10 g/L of sulfuric acid, reducing the amount of sulfuric acid.