Competitive adsorption of wellbores corrosion inhibitor onto steel, esmectite and sandstone

Quimica nova

Queiroz Neto, João C.¹  Petri, Denise F. S.²  Souza, Ingrid A. G. A.² 

[1] Centro de Pesquisas e Desenvolvimento da Petrobras, Rio de Janeiro, Brasil;Universidade de São Paulo, São Paulo, Brasil

关键词: corrosion inhibitor;    adsorption;    acidification.;   

DOI  :  10.1590/S0100-40422009000100023

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

A commercial corrosion inhibitor used in petroleum production was characterized by means of infrared spectroscopy and energy dispersive spectroscopy (EDS). Predicting the adsorption behavior of corrosion inhibitor onto steel, sandstone and esmectite is the key to improve working conditions. In this study, the adsorption kinetics of inhibitor formulations in HCl 15% or in Mud Acid (HCl 13,5% and ammonium bifluoride) onto steel, sandstone and esmectite was determined by means of spectrophotometry. Kinetic parameters indicated that adsorption of inhibitor in the presence of bifluoride was favored. Moreover, the adsorption constant rate was the largest when the substrate was esmectite.

【 授权许可】

CC BY