Aminophosphonate corrosion inhibitors for steel

被引:26
作者
Kuznetsov, YI
Kazanskaya, GY
Tsirulnikova, NV
机构
[1] Russian Acad Sci, Inst Phys Chem, Moscow 119991, Russia
[2] Inst Chem Reagents & Special Pur Subst, Moscow, Russia
来源
PROTECTION OF METALS | 2003年 / 39卷 / 02期
关键词
Iron; Calcium; Magnesium; Inorganic Chemistry; Stability Constant;
D O I
10.1023/A:1022986625711
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The protective properties of aminophosphonic acids and their magnesium and calcium complexes were studied on the example of rotating steel cylinders specimens in soft water. Only two of the seven acids studied, namely 1,1-hydroxycarboxypropane-3-amino-di(methylenephosphonic) and hexamethylenediamine-N,N-tetra(methylenephosphonic) acids, can suppress the corrosion of steel in water completely. As a rule, complexonates are much more effective them the corresponding acids; if the complexing agent is fixed, then the stability constants (K-s) of the complexes become the major factor. For phosphonates of Mg2+ and Ca2+, which are usually less stable than the corresponding iron complexonates, the dependence of the protective concentration on K-s passes through a maximum; the complexonates of those acids whose own protective properties are weaker are more effective. Imino-N,N-diacetic-N-methylenephosphonic acid can serve as an example. By contrast, the relatively more stable complexonates, for example calcium nitrilotri(methylenephosphonate), are much less effective than the acid itself.
引用
收藏
页码:120 / 123
页数:4
相关论文
共 8 条
[1]  
Ermolenko S.G., 1995, ZASHCH MET, V31, P341
[2]  
KALMAN E, 1994, PUBLICATIONS I MAT, V11, P13
[3]  
KUBICKI J, 1995, P 8 EUR S CORR INH F, V1, P521
[4]  
KUZNETSOV JI, 1998, 5 OG S NAUK TECHN PO, P75
[5]  
Kuznetsov SA, 1997, RUSS J ELECTROCHEM+, V33, P234
[6]  
Kuznetsov Y.l., 1996, ORGANIC INHIBITORS C, DOI 10.1007/978-1-4899-1956-4
[7]  
KUZNETSOV YI, 1993, PROGR UNDERSTANDING, V2, P13
[8]  
KUZNETSOV YI, ZASHCH MET, V36, P401