Pitting corrosion in the wet section of the automotive exhaust systems
Pitting corrosion in the wet section of the automotive exhaust systems
复制标题
汽车排气系统湿部的点蚀
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
P. Gümpel
中科院分区：
文献类型：
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作者：
C. Hoffmann;P. Gümpel
摘要 目的：在汽车排气系统的后部，具有相当高的氯离子浓度和通常较低的 pH 值的冷凝物与电化学活性烟灰颗粒一起会导致内表面出现明显的点蚀。为了选择能够实现经济高效的施工的适当材料，必须对不同候选等级的耐腐蚀性进行评级。设计/方法/途径：发生的不同类型的腐蚀（一般腐蚀和点蚀）需要结合腐蚀攻击的评估方法：使用质量损失测量和使用光学 3D 测量系统 MicroCAD 测量一定数量凹坑的平均深度。研究结果：两种评估腐蚀攻击的方法提供了相同的材料排名。这两种方法是相互补充的，并且它们共同提供了一些研究材料之间的显着差异。
AbstrAct Purpose: In the rear section of the automotive exhaust systems condensates bearing appreciable chloride ion concentrations and often low pH-values together with particles of electrochemical active soot can lead to pronounced pitting corrosion on the inner surfaces. For selection of an appropriate material that can enable cost-effective construction, the corrosion resistance of different candidate grades has to be rated. Design/methodology/approach: The different types of occurring corrosion, both general attack and pitting corrosion demands a combination of evaluation methods of the corrosion attack: mass loss measurements and the measure of the average depth of a certain number of pits with an optical 3D-Measuring System MicroCAD were used. Findings: The two methods for the evaluation of the corrosion attack provide the same ranking of the materials. Both methods are complementary to each other and together they provide a noticeable differentiation between some of the investigated materials.