点击次数：

论文类型：期刊论文

发表时间：2015-01-01

发表刊物：CORROSION SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：90

页面范围：296-304

ISSN号：0010-938X

关键字：Carbon steel; SEM; EIS; Acid corrosion; Acid inhibition

摘要：Calcium alginate gel (Alg-Ca2+) capsules loaded with inhibitor and heavy additive were prepared by a piercing-solidifying method. The releasing process of inhibitor together with their inhibitive effect on P110 steel in CO2-saturated 3.5 wt.% NaCl aqueous solution was investigated by ultraviolet-visible spectrophotometer, scanning electron microscopy, electrochemical impedance spectroscopy. Our experiments revealed that the synthesized capsules can gradually release inhibitors during their sinking process, and effectively prevent the tube in oilwell from corrosion. Introducing appropriate amount of heavy additive BaSO4 into the inhibitor-loaded capsules facilitates their sinking processes and corrosion protection performance. (C) 2014 Elsevier Ltd. All rights reserved.