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Preparation and Behavior of Slow-Release Granular Corrosion Inhibitor

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  • Xi’an Changqing Chemical Group Co.,Ltd.,Xi’an 710018,China

Received date: 2023-02-27

  Revised date: 2023-03-12

  Accepted date: 2023-04-15

  Online published: 2023-08-25

Abstract

 In order to solve the problem of difficulty in filling liquid corrosion inhibitors underground,the granular corrosion inhibitors were prepared by mixing,internal mixing,crushing,injection molding,and other processes.The release rate of the granular corrosion inhibitor was investigated by UV spectrophotometry,the inhibition efficiency of the granular corrosion inhibitor on carbon steel was evaluated by weight-loss coupon method,the mechanism of granular inhibitor was studied by electrochemical test,and the morphology of metal surface was investigated by scanning electron microscope.Results showed that the release of the prepared granular inhibitor was relatively stable,and the release cycle was more than 90 d.The granular inhibitor was a hybrid type inhibitor mainly inhibiting anode.After pre-releasing in the simulated formation water with saturated CO2 at 90 ℃,the inhibition rate of the granular inhibitor on carbon steel exceeded 90%.

Cite this article

LIAN Yubo, HUANG Chen, WENG Huatao, WEI Yajun, HAN Chuanghui, LI Wenjuan . Preparation and Behavior of Slow-Release Granular Corrosion Inhibitor[J]. Materials Protection, 2023 , 56(8) : 70 -76 . DOI: 10.16577/j.issn.1001-1560.2023.0188

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