首页|Descaling Behavior of 430 Hot-rolled Stainless Steel in HCl-based Solution

Descaling Behavior of 430 Hot-rolled Stainless Steel in HCl-based Solution

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Descaling of hot-rolled stainless steel is generally implemented through pickling process in HNO3-HF mixed acids,which induces severe environmental concerns of nitrogen oxide (NOx) gases and nitrites.According 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 process.Under the experimental condition,the HCl-based solution can compete with ordinary HNO3-HF mixed acids in terms of pickling efficiency,surface integrity and the removal of Cr-depleted layer.The descaling process of 430 hot-rolled stainless steel in the HCl-based solution consisted of three steps.The descaling solution penetrated the oxide scales into the underlying metal,dissolving the Cr-depleted layer and part of substrates.The oxide scales peeled off from the stainless steel and a polished and smooth surface was exposed.The descaled stainless steel was dissolved uniformly in the HCl-based solution;therefore,the pickling duration was vital for desired surface integrity.Under the static condition,the appropriate descaling time of 430 hotrolled stainless steel in HCl-based solution was 400 s.

descalinghot-rolled ferritic stainless steelpicklingelectrochemistry

Ying-ying YUE、Cheng-jun LIU、Pei-yang SHI、Mao-fa JIANG、Li-yan QIN、Guang-wei FAN

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School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

Shanxi Taigang Stainless Steel Co., Ltd., Taiyuan 030003, Shanxi, China

Item Sponsored by National Natural Science Foundation of ChinaItem Sponsored by National Natural Science Foundation of ChinaNew Century Excellent Talents in University of China

5130404251374059NCET-11-0077

2016

钢铁研究学报(英文版)
钢铁研究总院

钢铁研究学报(英文版)

CSTPCDCSCDSCI
影响因子：0.584
ISSN：1006-706X
年,卷(期)：2016.23(3)
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