|
|
|
| Effects of Different Oxidants on HCl-based Pickling Process of 430 Stainless Steel |
| Qiong XIE,Pei-yang SHI,Cheng-jun LIU,Mao-fa JIANG |
| Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education, Northeastern University,Shenyang 110819, Liaoning, China |
|
|
|
|
Abstract To shorten the time required for the pickling process and to enhance the quality of ferritic stainless steel plates, the effects of oxidants including hydrogen peroxide (H2O2), potassium permanganate (KMnO4), and potassium chlorate (KClO3) on the pickling behavior in HCl-based electrolyte as well as the surface quality of hot-rolled and blasted 430 stainless steel (430-SS) were studied. Experiments were conducted using mass-loss tests, microstructure analyses, potentiodynamic polarization curves, and electrochemical impedance spectroscopy measurements. The results showed that the addition of oxidants substantially accelerated the pickling process of 430-SS by enhancing the cathodic reaction rate and reducing the charge transfer resistance. In electrolytes comprising 5-8 mass% HCl at a temperature of 40-60 �� and at the same concentration within the range from 0 to 2 mass%, H2O2 was demonstrated to be superior to KMnO4 and KClO3 in accelerating the pickling process. The surface quality of 430-SS pickled in the presence of H2O2 was better than those of specimens pickled in the presence of KMnO4 and KClO3 when the removal of the oxide layer, intergranular corrosion, and surface roughness were collectively considered. When 1 mass% H2O2 was added, the mass loss rate of 430-SS was increased by 629% and no residual oxide layer or intergranular corrosion was observed on the surface of the steel; in addition, the roughness was only 1��7 ��m. H2O2 was determined to be a better oxidant than KMnO4 and KClO3 when the pickling process, surface quality, solution recycling, and environment protection were considered as a whole.
|
|
Received: 24 September 2015
Published: 09 August 2016
|
| Fund:Science and Technology Development |
|
|
|
| [1] |
Zheng-yun Zhang,Jian-chun Cao,*,Zhong-hua Zhong,Xiao-long Zhou,Wei Chen,Yin-hui Yang. Tensile deformation behavior of high strength anti-seismic steel with multi-phase microstructure[J]. Chinese Journal of Iron and Steel, 2017, 24(1): 111-120. |
| [2] |
De-ning ZOU,Rong LIU,Jiao LI,Wei ZHANG,Duo WANG,Ying HAN,. Corrosion Resistance and Semiconducting Properties of Passive Films Formed on 00Cr13Ni5Mo2 Supermartensitic Stainless Steel in Cl- Environment[J]. Chinese Journal of Iron and Steel, 2014, 21(6): 630-636. |
| [3] |
WANG Hai-ren,,JIANG Yan,QU Jun-e,CAO Zhi-yong,LIU Shao-bo,GUO Xing-peng. Adsorption and Corrosion Inhibition Performances of 1-Tetradecylphosphonic Acid Self-Assembled Monolayers on 430 Stainless Steel Surface[J]. Chinese Journal of Iron and Steel, 2013, 20(9): 93-98. |
| [4] |
JIANG Zhou-hua,ZHUANG Ying,LI Yang,LI Shuang-jiang. Effect of Modification Treatment on Inclusions in 430 Stainless Steel by Mg-Al Alloys[J]. Chinese Journal of Iron and Steel, 2013, 20(5): 6-10. |
| [5] |
WANG Hai-ren,,XIAO Zhen,QU Jun-e,YANG Hong-wei,CAO Zhi-yong,GUO Xing-peng. A Comparison Study on Corrosion Resistance of 430 Stainless Steel Surfaces Modified by Alkylsilane and Fluoroalkylsilane SAMs[J]. Chinese Journal of Iron and Steel, 2013, 20(12): 75-81. |
| [6] |
ZHANG Li-qiang1,2,BAO Yan-ping1,WANG Min1,PENG Zun1,WANG Rui1. Thermal Expansion Coefficients of GCr15 Steel[J]. Chinese Journal of Iron and Steel, 2012, 24(09): 40-44. |
|
|
|
|
2016, Vol. 23 
