Effect of shot peening and hydrochloric acid pickling on oxide layer microstructure of 2205 duplex stainless steel hot-rolled sheet

doi:10.13251/j.issn.0254-6051.2021.02.013

Abstract

Abstract: Optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS) were used to study the oxide layer microstructure of the 2205 duplex stainless steel hot-rolled sheet after annealing and shot peening treatment, and to analyze the microstructure of the surface passive film after pickling with hydrochloric acid and mixed acid (HNO₃+HF). The corrosion resistance of the steel after pickling was analyzed by using electrochemical testing methods. Further, an evolution model of oxide layer removal during shot peening and pickling of the hot rolled 2205 duplex steel sheet after annealing was proposed. The results show that the shot peening treatment has significant effect on the removal of Fe-rich oxide in the 2205 duplex steel surface layer, but the dense Cr-rich oxide layer within the inner layer cannot be removed. Hydrochloric acid pre-pickling can further remove the dense oxide layer from outside to inside after shot peening, and the final pickling with nitric acid and hydrofluoric acid can remove the Cr-poor layer produced by annealing, so that a Cr₂O₃-rich passive film is formed on the steel surface. The 2205 duplex steel after mixed acid pickling shows higher self-corrosion potential and larger arc resistance radius than that of hydrochloric acid pre-acid pickling, indicating that mixed acid pickling is beneficial to improve the corrosion resistance of 2205 duplex stainless steel.

Key words: 2205 duplex stainless steel, shot peening, pickling, oxide layer

CLC Number:

TG178

Wang Jian, Meng Haojie, Li Peng, Li Guoping, Li Jun, Liu Jie, Han Peide. Effect of shot peening and hydrochloric acid pickling on oxide layer microstructure of 2205 duplex stainless steel hot-rolled sheet[J]. Heat Treatment of Metals, 2021, 46(2): 74-80.

References

[1] Kumar A,Khatirkar R K,Chalapathi D,et al.Microstructure and texture development during cold rolling in UNS S32205 and UNS S32760 duplex stainless steels[J].Metallurgical and Materials Transactions A,2017,48(5):2349-2362.
[2] Ha H,Jang M H,Lee T H,et al.Interpretation of the relation between ferrite fraction and pitting corrosion resistance of commercial 2205 duplex stainless steel[J].Corrosion Science,2014,89:154-162.
[3] 陈玲玲,索慧波,梁晓慧.时效制度对2205双相不锈钢耐蚀性能的影响[J].金属热处理,2014,39(8):105-108.
Chen Lingling,Suo Huibo,Liang Xiaohui.Effect of aging process on corrosion resistance of 2205 duplex stainless steel[J].Heat Treatment of Metals,2014,39(8):105-108.
[4] 邢珊珊,戚浩宇,郑传波.固溶处理对2205双相不锈钢组织及钝化膜特性的影响[J].金属热处理,2020,45(3):146-150.
Xing Shanshan,Qi Haoyu,Zheng Chuanbo.Effect of solution treatment on microstructure and passivation film properties of 2205 duplex stainless steel[J].Heat Treatment of Metals,2020,45(3):146-150.
[5] 杨吉春,刘香军,周莉,等.氮对2205双相不锈钢在NaCl溶液中耐腐蚀性能的影响[J].金属热处理,2019,44(5):6-11.
Yang Jichun,Liu Xiangjun,Zhou Li,et al.Effect of nitrogen on corrosion resistance of 2205 duplex stainless steel in NaCl solution[J].Heat Treatment of Metals,2019,44(5):6-11.
[6] Li L F,Jiang Z H,Riquier Y.High-temperature oxidation of duple stainless steels in air and mixed gas of air and CH₄[J].Corrosion Science,2005,47(1):57-68.
[7] Donik C,Kocijan A,Mandrino D,et al.Initial oxidation of duplex stainless steel[J].Applied Surface Science,2009,255(15):7056-7061.
[8] Li L F,Celis J P.Pickling of austenitic stainless steels (a review)[J].Canadian Metallurgical Quarterly,2003,42(3):365-376.
[9] 刘承军,岳莹莹,史培阳,等.热轧不锈钢板酸洗工艺[J].中国冶金,2016,26(8):39-44.
Liu Chengjun,Yue Yingying,Shi Peiyang,et al.Pickling process of hot-rolled stainless steel[J].China Metallurgy,2016,26(8):39-44.
[10] 卜福明,叶纯杰,潘红良.热轧430不锈钢表面氧化皮的电解酸洗、混酸酸洗工艺研究[J].材料保护,2010,43(5):46-48.
Bo Fuming,Ye Chunjie,Pan Hongliang.Technology for removal of oxide scale on hot-rolled stainless steel by electrolysis plus pickling in mixed ccids[J].Journal of Materials Protection,2010,43(5):46-48.
[11] 薛清连,邹德宁,田成,等.430不锈钢退火氧化层酸洗行为研究[J].热加工工艺,2015(14):218-221.
Xue Qinglian,Zou Dening,Tian Cheng,et al.Research on pickling behavior of 430 stainless steel annealing oxidation layer [J].Hot Working Technology,2015(14):218-221.
[12] Li H,Zhao A.Pickling behavior of duplex stainless steel 2205 in hydrochloric acid solution[J].Advances in Materials Science and Engineering,2019:1-6.
[13] 闫松毓,秦丽雁,范光伟,等.盐酸基酸洗液对热轧304不锈钢表面氧化铁鳞酸洗效果研究[J].腐蚀科学与防护技术,2015,27(2):153-158.
Yan Songyu,Qin Liyan,Fan Guangwei,et al.Effect of chloride ion concentration of pickling liquor on removal of oxide scale on hot-rolled 304 stainless steel [J].Corrosion Science and Protection Technology,2015,27(2):153-158.
[14] 刘芳,秦丽雁,闫松毓,等.氯离子含量对热轧430不锈钢氧化皮酸洗质量的影响[J].太原理工大学学报,2014,45(6):741-744.
Liu Fang,Qin Liyan,Yan Songyu,et al.Effect of chloride ion concentration on the pickling process for the oxide scale of hot-rolled 430 stainless steel [J].Journal of Taiyuan University of Technology,2014,45(6):741-744.
[15] Fu Y,Wu X,Han E H,et al.Effects of cold work and sensitization treatment on the corrosion resistance of high nitrogen stainless steel in chloride solutions[J].Electrochimica Acta,2009,54(5):1618-1629.
[16] Luo H,Dong C F,Xiao K,et al.Characterization of passive film on 2205 duplex stainless steel in sodium thiosulphate solution[J].Applied Surface Science,2011,258:631-639.
[17] 任培东,武小强,王长波,等.固溶处理对2205双相不锈钢氧化铁皮结构的影响[J].钢铁研究学报,2018,30(12):75-81.
Ren Peidong,Wu Xiaoqiang,Wang Changbo,et al.Effect of solution treatment on structure of oxide scales for 2205 duplex stainless steel [J].Journal of Iron and Steel Research,2018,30(12):75-81.
[18] 周鹏,惠恺,臧涛,等.双相不锈钢2205热轧钢带氧化铁皮显微分析[J].钢铁,2015(5):65-68,98.
Zhou Peng,Hui Kai,Zang Tao,et al.Analysis of oxide scales microstructure of hot rolled duplex stainless steel 2205 strip [J].Iron and Steel,2015(5):65-68,98.
[19] 李晓亮,史培阳,岳莹莹,等.盐酸浓度对热轧不锈钢酸洗板表面质量的影响[J].东北大学学报(自然科学版),2014,35(11):1548-1551.
Li Xiaoliang,Shi Peiyang,Yue Yingying,et al.Effect of hydrochloric acid on the surface integrity of hot-rolled stainless steel sheets during pickling process [J].Journal of Northeastern University(Natural Science),2014,35(11):1548-1551.
[20] José L G,Dufour J,Negro C,et al.Fluoride speciation in stainless steel pickling liquor[J].ISIJ International,2006,46(2):281-286.