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Descaling Behavior of 430 hot-rolled stainless steel in HCl-based Solution

Journal of Iron and steel Research International 2016年第3期23卷 190-196页

作者： Ying-ying YUE Cheng-jun LIU Pei-yang SHI Mao-fa JIANG Li-yan QIN Guang-wei FAN School of Materials and Metallurgy Northeastern University Shanxi Taigang stainless steel Co. Ltd.

Descaling of hot-rolled stainless steel is generally implemented through pickling process in HNO_3-HF mixed acids,which induces severe environmental concerns of nitrogen oxide（NOx）gases and *** to the electrochemical measurement,the mass loss test and the appearance analysis,a new pickling process which employed HCl-based solution was proposed and evaluated to provide theoretical basis for the development of environment-friendly and highly effective pickling *** the experimental condition,the HCl-based solution can compete with ordinary HNO_3-HF mixed acids in terms of pickling efficiency,surface integrity and the removal of Crdepleted *** descaling process of 430hot-rolled stainless steel in the HCl-based solution consisted of three *** descaling solution penetrated the oxide scales into the underlying metal,dissolving the Cr-depleted layer and part of *** oxide scales peeled off from the stainless steel and a polished and smooth surface was *** descaled stainless steel was dissolved uniformly in the HCl-based solution;therefore,the pickling duration was vital for desired surface *** the static condition,the appropriate descaling time of 430 hotrolled stainless steel in HCl-based solution was 400 s.

关键词： descaling hot-rolled ferritic stainless steel pickling electrochemistry

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