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首页> 外文期刊>International Journal of Electrochemical Science >Differential Scanning Calorimetry and Electrochemical Tests for the Analysis of Delamination of 3PE Coatings
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Differential Scanning Calorimetry and Electrochemical Tests for the Analysis of Delamination of 3PE Coatings

机译：差示扫描量热法和电化学测试对3PE涂层分层的分析

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In order to identify the causes of coating delamination on buried pipelines, a field test was conducted todetermine the environmental condition of delaminated coatings, and then an electrochemical test andDSC were used to find the cause of delamination. The results show that the main cause of delaminatedcoatings with defects is the diffusion of electrolyte on the coating and metal interface, which can bedivided into three stages, the formation of corrosive crevice, oxygen concentration corrosion, and thehydrogen evolution process. In addition, based on the physical meaning of EECs, the correlation betweenf θmax and all other parameters was established. The result of DCS demonstrates that lacking the cross-linking density of epoxy can also result in delamination of 3PE coatings.
机译：为了确定地下管道上涂层分层的原因，进行了现场测试以确定分层涂层的环境条件，然后通过电化学测试和DSC找出分层的原因。结果表明，有缺陷的分层涂层的主要原因是电解质在涂层和金属界面上的扩散，可分为三个阶段：腐蚀缝隙的形成，氧浓度的腐蚀和氢的生成过程。此外，根据EEC的物理含义，建立了fθmax与所有其他参数之间的相关性。 DCS的结果表明，缺乏环氧树脂的交联密度也会导致3PE涂层分层。

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