Experimental researches concerning the corrosion resistance of stainless steels for automotive exhaust systems
Experimental researches concerning the corrosion resistance of stainless steels for automotive exhaust systems
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汽车排气系统用不锈钢耐腐蚀性能的实验研究
DOI：
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发表时间：
2010
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
汽车排气系统后部的特殊腐蚀条件对用于这些部件的不锈钢提出了很高的要求：不同铬和钼含量的铁素体钢以及不同类型的奥氏体钢。为了选择合适的材料以实现经济高效的设计，必须对不同材料的耐腐蚀性进行额定。以VDA230-214标准试验为基础，对汽车排气系统用不同牌号不锈钢的耐蚀性进行了实验室试验。在实验室测试的同时，还研究了模拟烟尘颗粒的活性碳在电化学测量中的影响。开发了一种新的样品制备方法，该方法消除了边缘效应，并使活性碳能够放置在样品的金属表面。试验结果表明，活性碳对腐蚀性能有显著影响。这种情况应该在未来的汽车排气系统用不锈钢的测试方法中加以考虑。
The special corrosion conditions in the rear section of automotive exhaust systems cause high demands on stainless steels used for these components: ferritic steels with different contents of chromium and molybdenum as well as austenitic steel types. For selecting an appropriate material enabling cost-effective design, the corrosion resistance of different materials has to be rated. The corrosion resistance of different stainless steel grades for automotive exhaust systems has been assayed in a laboratory test on the basis of the standard VDA 230-214-test. Concurrent to the laboratory tests the influence of the active carbon, simulating the soot particles, has been investigated in electrochemically measurements. A new preparation method of the samples has been developed, which eliminates the edge effects and also enables the placement of active carbon on the metallic surface of the samples. The results of the tests show that active carbon has a significant influence on the corrosion attack. This circumstance should be considered in the future test methods for stainless steels used in automotive exhaust systems.