Impact of a Novel Coating on Inorganic Scale Deposit Growth and Adhesion

Marcus P. Heydrich, A. Hammami, Suresh Choudhary, Marcos Mockel, J. Ratulowski
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引用次数: 7

Abstract

The deposition and growth of scale on the internal surface of oil & gas pipelines is a major challenge in the operation and maintenance of these lines. Pigging and chemical treatment are currently available solutions, but these are expensive, and a permanent passive alternative would be preferable. Diamond Like Coatings (DLC) have shown considerable promise, but the industry remains skeptical in the absence of conclusive evidence. This work addresses the question for a novel super hydrophobic DLC with a parametric evaluation of factors affecting adhesion and growth of common scale groups (such as Calcites and Barites) including surface finish of the substrate, metal composition, and thickness (or presence) of the coating, as well as the differing mechanisms of scale growth where applicable. The approach involves controlled deposition of inorganic scales onto rotational cylindrical electrodes (RCE) under varying conditions of temperature, solution chemistry, flow rates, followed by submerged jet impingement to quantify the corresponding deposit bond strengths and failure modes (cohesion vs. adhesion). Design of Experiments (DOE) methods are used to set and analyze the contribution of deposition and matrix factors simultaneously.
一种新型涂层对无机垢沉积生长和粘附的影响
油气管道内表面水垢的沉积和生长是油气管道运行和维护的主要挑战。目前,清管和化学处理都是可行的解决方案,但这些方法都很昂贵,而且永久性的被动替代方案更可取。类金刚石涂层(Diamond Like Coatings, DLC)已经显示出相当大的前景,但由于缺乏确凿的证据,该行业仍持怀疑态度。这项工作解决了一种新型超疏水DLC的问题,通过参数化评估影响常见水垢基团(如方解石和重晶石)的粘附和生长的因素,包括基材的表面光洁度、金属成分和涂层的厚度(或存在),以及适用的水垢生长的不同机制。该方法包括在不同的温度、溶液化学、流速条件下,控制无机垢在旋转圆柱形电极(RCE)上的沉积,然后通过水下射流撞击来量化相应的沉积结合强度和破坏模式(内聚与粘附)。采用实验设计(DOE)方法同时设定和分析沉积和基质因素的贡献。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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