Corrosion investigations of Al-Si casting alloys in 0.6 M NaCl solution

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY Engineering Review Pub Date : 2021-01-01 DOI:10.30765/ER.1577

S. S. Hanza, L. Vrsalović, L. Štic, L. Liverić

引用次数: 6

Abstract

This paper presents results of the corrosion investigations of specimens made from finished parts for the automotive industry, produced by high-pressure die casting and gravity die casting process of six Al-Si alloys (40000 series). Open circuit potential and potentiodynamic polarization measurements have been performed using a potentiostat with three-electrode set-up in 0.6 M NaCl naturally aerated solution. Microstructural characterization before and after electrochemical investigations has been carried out with optical microscope to establish the connection between microstructure and corrosion parameters of investigated alloys and to analyze and record surface changes of each sample due to electrochemical corrosion. All alloys show good corrosion resistance, which manifests with low values of corrosion rates, calculated from the corrosion current densities obtained from potentiodynamic polarization measurements. Differences in electrochemical behavior appear due to the distinctions in their chemical composition and microstructure. The type of casting process does not affect electrochemical behavior of Al-Si alloys.

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Al-Si铸造合金在0.6 M NaCl溶液中的腐蚀研究

本文介绍了用高压压铸法和重力压铸法生产的6种铝硅合金(40000系列)汽车用成品件试样的腐蚀研究结果。在0.6 M NaCl自然曝气溶液中，使用三电极定位器进行了开路电位和动电位极化测量。利用光学显微镜对电化学研究前后的微观组织进行表征，建立微观组织与被研究合金腐蚀参数之间的联系，分析并记录各试样在电化学腐蚀作用下的表面变化。根据动电位极化测量得到的腐蚀电流密度计算，所有合金均表现出良好的耐蚀性，表现为较低的腐蚀速率。电化学行为的不同是由于它们的化学成分和微观结构的不同。铸造工艺的类型对铝硅合金的电化学行为没有影响。

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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来源期刊

Engineering Review ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

0.00%

发文量

期刊介绍： Engineering Review is an international journal designed to foster the exchange of ideas and transfer of knowledge between scientists and engineers involved in various engineering sciences that deal with investigations related to design, materials, technology, maintenance and manufacturing processes. It is not limited to the specific details of science and engineering but is instead devoted to a very wide range of subfields in the engineering sciences. It provides an appropriate resort for publishing the papers covering prior applications – based on the research topics comprising the entire engineering spectrum. Topics of particular interest thus include: mechanical engineering, naval architecture and marine engineering, fundamental engineering sciences, electrical engineering, computer sciences and civil engineering. Manuscripts addressing other issues may also be considered if they relate to engineering oriented subjects. The contributions, which may be analytical, numerical or experimental, should be of significance to the progress of mentioned topics. Papers that are merely illustrations of established principles or procedures generally will not be accepted. Occasionally, the magazine is ready to publish high-quality-selected papers from the conference after being renovated, expanded and written in accordance with the rules of the magazine. The high standard of excellence for any of published papers will be ensured by peer-review procedure. The journal takes into consideration only original scientific papers.