STUDY ON THERMAL SPRAYING TECHNIQUE USED FOR RESISTANCE TO WET H2S SULPHIDE STRESS CRACKING

J Chin Soc Corr Pro

2003, Vol. 23

Issue (4): 243-247 DOI:

Research Report

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STUDY ON THERMAL SPRAYING TECHNIQUE USED FOR RESISTANCE TO WET H2S SULPHIDE STRESS CRACKING

Yiliang Zhang;Mu Wang;Yaofeng Sun

北京工业大学机电学院

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Yiliang Zhang; Mu Wang; Yaofeng Sun. STUDY ON THERMAL SPRAYING TECHNIQUE USED FOR RESISTANCE TO WET H2S SULPHIDE STRESS CRACKING. J Chin Soc Corr Pro, 2003, 23(4): 243-247 .

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Abstract Considering the urgent need for methods of resistan ce to wet H2S stress corrosion cracking (SSC) during petrochemical production ,this paper,with a view to isolate substrate from the corrosives,introduced arc spraying metallic coatings as a method resistant to SSC.Five coating products i ncluding both coatings of Al series and coatings of Fe-Cr series,which are made from self-developed cored wires,were designed.A series of tests where variables such as bond adhesion tests,hydrogen permeation tests,electrochemical tests and stress corrosion tests were carried out in order to check the performance of SSC .The test results of all kinds of coatings were compared with each other,a kind of most protective coating termed ZH4 containing Al+Al2O3+RE was obtained.I n addition,the protective mechanism of coatings resistance to SSC was discussed. 

Key words: wet H2S stress corrosion cracking thermal spraying c oating cored wire

Received: 20 November 2001

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