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首页> 外文会议>NACE International annual conference exposition;Corrosion 2000 >COATING QUALITY IN CP/COATING SYSTEMS - COMPARISON OF ACCELERATED TEST AND LONG TIME EXPOSURE
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COATING QUALITY IN CP/COATING SYSTEMS - COMPARISON OF ACCELERATED TEST AND LONG TIME EXPOSURE

机译：CP /涂层系统中的涂层质量-加速测试和长时间暴露的比较

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摘要

Cathodic protection (CP) in combination with organic coatings is a well-known corrosion protective system forrnsteel structures submerged in seawater. The coatings are exposed to an environment that may cause loss ofrnadhesion, i.e. cathodic disbonding. The breakdown of coatings in CP/coating systems has been investigated.rnSix different coating systems have been exposed in accelerated tests for cathodic disbonding according to ASTMrnG81 and BS3900 Part F102. Painted panels were also exposed to natural sea water at ambient temperature whilerncathodically protected with AI anodes. Data from 4 years exposure are presented. Cathodic current demand,rnrandom blistering and the extent of disbonding from a coating defect were measured.rnThe investigation indicates that the new generation of modified epoxies performs better than the traditional coalrntar epoxy. The ASTM G8 test used as pre-qualification test at present is not able to give a correct ranking of therncoatings tested while the "modified" BS3900 Part F10 test seem to give a correct ranking.
机译：阴极保护（CP）与有机涂层的结合是众所周知的浸没在海水中的钢结构的腐蚀保护系统。涂层暴露于可能导致粘附力损失，即阴极剥离的环境中。已经研究了CP /涂料系统中涂料的分解情况。根据ASTMrnG81和BS3900 Part F102，在阴极剥离的加速测试中已经暴露了六种不同的涂料系统。涂漆的面板在环境温度下也要暴露在天然海水中，同时用AI阳极进行阴极保护。给出了4年暴露的数据。测量了阴极电流需求，无规律的起泡以及与涂层缺陷的剥离程度。研究表明，新一代改性环氧树脂的性能要优于传统的环氧煤灰。当前用作资格预审测试的ASTM G8测试无法对测试的涂层给出正确的排名，而“修改的” BS3900 Part F10测试似乎给出了正确的排名。

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