Application of Cathodic Protection on the Outer Wall of Acetylene Wet Gas Cabinet Bell Cover

ZU Yunhe, LI Cunwen, LI Hongda, TIAN Feng, XIE Fan, CHEN Yaping

doi:10.16577/j.issn.1001-1560.2024.0217

Materials Protection >

2024 , Vol. 57 >Issue 9: 189 - 194

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0217

Application of Cathodic Protection on the Outer Wall of Acetylene Wet Gas Cabinet Bell Cover

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(1.State Key Laboratory of Special Surface Protection Materials and Application Technology，China Academy of Machinery Wuhan Research Institute of Materials Protection Co.， Ltd.， Wuhan 430030， China；2.Zhongyan Jilantai Chloroalkali Chemical Co.， Ltd.， Alxa 750336， China)

ZU Yunhe(1988-)， Engineer， Bachelor’s Degree， Research Focus: Cathodic Protection， Tel.: 13545395267，E-mail: 851419432＠qq.com

Received date: 2024-02-28

Revised date: 2024-05-24

Accepted date: 2024-05-26

Online published: 2024-11-14

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Abstract

In response to the tight maintenance schedule of the acetylene wet gas cabinet bell cover at a chemical plant in Inner Mongolia， the subsequent layers of coating were carried out before the previous coatings had fully cured， leading to defects in the coating itself.After longterm operation， phenomena such as cracking and peeling occurred， and the outer wall of the bell cover became severely rusted， even perforated， posing a significant safety hazard.To control the corrosion of the outer wall of gas cabinet bell cover， the magnesium anode and zinc anode were installed in the fixed area in the early stage， and the corrosion rate was tested by hanging corrosion coupons to get the best anti-corrosion effect of magnesium anode.Based on theoretical calculations and the proper arrangement of anodes in the later stage， construction and installation carried out during the maintenance period， and the cathodic protection effect was tested to meet ≤-0.85 V (vs CSE) after the installation was completed.By combining cathodic protection with existing coatings， corrosion on the outer wall of the bell cover was slowed or suppressed，thereby extending its service life.

Key words： ; font-family:"; font-size:16px; font-style:normal; font-weight:400; ">cathodic protection; corrosion; wet gas cabinet; clock cover outer wall

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ZU Yunhe, LI Cunwen, LI Hongda, TIAN Feng, XIE Fan, CHEN Yaping . Application of Cathodic Protection on the Outer Wall of Acetylene Wet Gas Cabinet Bell Cover[J]. Materials Protection, 2024 , 57(9) : 189 -194 . DOI: 10.16577/j.issn.1001-1560.2024.0217

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