The effect of acetohydroxamic acid on stainless steel corrosion in nitric acid |
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| Institution: | 1. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA;2. Present address: Institute of Mechanics, Materials and Civil Engineering, Université catholique de Louvain, Louvain-la-Neuve B-1348 Belgium;1. National Research Centre, Electrochemistry Laboratory, Dokki, Cairo 12622, Egypt;2. Energy Materials Laboratory, Physics Department, School of Sciences and Engineering, The American University in Cairo, P.O. Box 74, New Cairo 11835, Egypt;1. College of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, China;2. Dsign and Research Institute of Marine & Offshore, Qingdao Beihai Shipbuilding Heavy Industry Co., LTD, Qingdao, 266520, China;3. The 2nd Engineering Co.Ltd of China Railway 17 Bureau Group Corporation, Xi’an 710043, China;1. Vrije Universiteit Brussel, SURF department, Pleinlaan 2, 1050 Brussels;2. Vrije Universiteit Brussel, ETEC department, Pleinlaan 2, 1050 Brussels;1. Chemistry Group, Faculty of Basic Science, Azarbaijan Shahid Madani University, Tabriz, Iran;2. Department of Chemistry, Shahid Beheshti University, G.C., Evin-Tehran, Iran;1. Center of Research Excellence in Corrosion, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia;2. Center for Engineering Research, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia |
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| Abstract: | We present the first study of the effect of acetohydroxamic acid (AHA) on the corrosion behaviour of stainless steels. Particularly, studies have been performed using steels and physico-chemical conditions equivalent to those proposed for use in advanced nuclear reprocessing platforms. In these, AHA has been shown to have little effect on either steel passivation or reductive dissolution of both SS304L and SS316L. However, under transpassive dissolution conditions, AHA while in part electrochemically oxidised to acetic acid and nitroxyl/hydroxylamine, also complexes with Fe3 +, inhibiting secondary passivation and driving transpassive dissolution of both steels. |
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