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A Critical Review of Industry Codes and Standards as They Relate to Electrically Resistive Coatings and What That Means to Shielding

机译:严格审查与电阻涂层有关的行业规范和标准,以及屏蔽的含义

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Cathodic shielding of pipeline coatings is an important issue among coatings specialists and suppliers but may be one of the most misunderstood yet talked about phenomenon in the pipe coatings marketplace. It is not clearly defined in real terms but certain industry codes and standards define characteristics of pipeline coatings that are desirable attributes. However, those attributes result in a coating that could be interpreted as a coating that "shields". Generally all coatings are electrically resistive however resistivity levels vary depending on the coating technology employed and the conditions of service. Electrically resistive coatings, or otherwise referred to as high dielectric strength coatings, have a unique place in the industry but should not be misrepresented as being a negative because of their ability to resist the flow of cathodic current. This discussion paper will summarize what various national and international codes and standards say about coating attributes and review test methods which are used to measure resistivity. This will relate specifically to electrical resistivity of coatings and look at the said attributes of the coatings with respect to how the codes and standards comment on shielding, if at all. The paper will also look at independent testing along with manufacturer and user sponsored research into coatings and their electrical interaction.
机译:管道涂料的阴极屏蔽是涂料专家和供应商之间的重要问题,但可能是管道涂料市场上最被人们误解但尚未被谈论的现象之一。它没有以实际术语明确定义,但是某些行业规范和标准定义了管道涂层的特性,这些特性是理想的属性。然而,那些属性导致涂层可以被解释为“屏蔽”的涂层。通常,所有涂层都是电阻性的,但是电阻率水平取决于所采用的涂层技术和使用条件。电阻涂层,或称为高介电强度涂层,在行业中占有独特的地位,但由于其具有抵抗阴极电流流动的能力,因此不能被误认为是负极性的。本讨论文件将总结各种国内和国际法规和标准对涂层属性的看法,并复述用于测量电阻率的测试方法。这将特别涉及涂层的电阻率,并就规范和标准对屏蔽的评论(如果有的话)来看涂层的所述属性。本文还将探讨独立测试以及制造商和用户赞助的涂层及其电相互作用的研究。

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