The effect of varying ruthenium content on the corrosion behaviour of two cathodically modified superferritic stainless steels |
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| Affiliation: | 2. Physical Metallurgy Division, Mintek, Private Bag X3015, Randburg, 2125, Republic of South Africa;4. Department of Metallurgical Engineering and Materials Science, University of Witwatershand, P.O. Wits, 2050, Republic of South Africa;1. Department of Mechanical Engineering, Acharya Institiute of Technology, Bangalore, Karnataka, India;2. Department of Mechanical Engineering, Vivekananda Institute of Engineering & Technology,Puttur, Karnataka, India;1. Fastener & Steel Research Center, National University of Kaohsiung, Kaohsiung, Taiwan, ROC;2. Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung, Taiwan, ROC;3. Porite Taiwan Co., Ltd., Miaoli, Taiwan, ROC;1. Welding and Plastic Forming Division, Aero Engine Corporation of China Beijing Institute of Aeronautical Materials, Beijing 100095, China;2. Materials Evaluation Center for Aeronautical and Aeroengine Application, Aero Engine Corporation of China Beijing Institute of Aeronautical Materials, Beijing 100095, China;3. Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK |
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| Abstract: | The corrosion behaviour of two superferritic stainless steels, both containing varying amounts of ruthenium, was evaluated and compared in a 10% sulphuric acid solution. It was found that small additions of ruthenium increased the corrosion resistance in both types of alloys dramatically. Apart from raising the corrosion potential of the base alloys, the cathodic Tafel slopes were also decreased with an increasing amount of ruthenium in each alloy type. The amount of ruthenium for an optimum increase in the corrosion resistance was found to be 0.16% for both types of alloy. |
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