QSPR prediction analysis of corrosion inhibitors in hydrochloric acid on 22%-Cr stainless steel

Journal of the Brazilian Chemical Society

Instituto Militar de Engenharia, Rio de Janeiro, Brazil¹  Borges, L. E. P.¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil¹  Cardoso, S. P.¹  Universidade Federal Fluminense, Niterói, Brazil¹  Gomes, J. A. da C. P.¹  Centro Federal de Educação Tecnológica de Química de Nilópolis, Nilópolis, Brazil¹  Hollauer, E.¹ 

关键词: corrosion inhibitor;    regression analysis;    QSPR (Quantitative Structure Properties Relationship);    interfaces;   

DOI  :  10.1590/S0103-50532006000700008

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Corrosion inhibitors have been widely used to prevent corrosion on stimulation operations on petroleum wells. Detailed experimental and theoretical investigation of twenty three different compounds including amines, thiourea derivatives, and acetylenic alcohols were carried out to estimate their inhibition corrosion efficiency on 22% Cr stainless steel (austenitic-ferritic, duplex) in hydrochloric acid (15% m/v) solutions. The obtained data were theoretically interpreted with respect to prediction, regression analysis (OLS), principal analysis component (PCA) and partial regression analysis (PLS) employing quantum and group contribution descriptors. In our study we found advantage in the use of the weight isoesteric Langmuir adsorption function (WILA), ln(qM/(1-q)) or lnKads. Excellent correlations were obtained for most models and few equations, results, calibration and validation plots were discussed in the text. The content of the present work represents a first step toward an efficient estimation of the inhibition corrosion efficiency (ICE) of arbitrary inhibitors towards several metals, alloys and steel types.

【 授权许可】

Unknown