Abstract: This study proposes the optimal type and ratios of acid/inhibitor as the pickling solutions from tropeolin OOO, cupferron and thiourea. The inhibitors and their action principles were respectively investigated through weight-loss method, scanning electron microscopy, metallographic microscopy, electrochemical method, contact angle and surface tension measurement, infrared spectroscopy. Results indicated that, tropeolin OOO has the most qualified inhibition effect amongst the above-mentioned three inhibitors, owning to its considerable hydrophobic film through the effect of poly-centric adsorption when the ratio of hydrofluoric/nitric acid approaches 1∶37.5. In addition, the increase of tropeolin OOO concentration can help to achieve enhanced inhibition performance, which makes it capable of guaranteeing a minimum weight-loss of 5.5 mg/cm2 and a maximum inhibition ratio of 79% at the concentration of 1.2 mmol/L. Besides, tropeolin OOO packs the metal surface via a multi-center adsorption mechanism and forms a layer of large-area hydrophobic film that can resist more solution with higher tropeolin OOO concentration. Moreover, the surface tension firstly decreases linearly as the inhibitor concentration increases, and then it approximates a steady value when the concentration reaches CMC (critical micelle concentration). In this case, the inhibitor molecules are adsorbed at a balanced rate and create best inhibition circumstance for Ti-6Al-4V.
杜娟, 刘青茂, 王付胜, 宋肖肖, 胡雪兰. Ti-6Al-4V钛合金在氢氟酸-硝酸体系下的缓蚀行为及机理[J]. 材料导报, 2019, 33(6): 1000-1005.
DU Juan, LIU Qingmao, WANG Fusheng, SONG Xiaoxiao, HU Xuelan. Corrosion Inhibiting Behaviors and Mechanism of Ti-6Al-4V in Hydrofluoric-Nitric Pickling Solutions. Materials Reports, 2019, 33(6): 1000-1005.
1 Vermesse E, Mabru C, Arurault L. Applied Surface Science,2013,285(19),629. 2 Bhola S M, Bhola R, Mishra B, Olson D L. Journal of Materials Science:Materials in Medicine,2011,22(4),773. 3 Hosseini S M A, Amiri M. Journal of the Iranian Chemical Society,2007,4(4),451. 4 Hosseini S M A, Sakari M, Quanbari M. Journal of Electrochemical Science,2007,2(12),935. 5 Chauhan J S, Gupta D K. Journal of Chemistry,2009,6(4),975. 6 Xie L, Wang X X. Rare Metal Materials and Engineering,2006,35(8),1219(in Chinese). 谢雷, 王小祥. 稀有金属材料与工程,2006,35(8),1219. 7 Cai D Z, Sang G, Wang Q F, et al. Rare Metal Materials and Enginee-ring,2014,43(6),1447(in Chinese). 蔡定洲, 桑革, 王庆富, 等. 稀有金属材料与工程,2014,43(6),1447. 8 You L M, Peng D Q, Zhou L Y, et al. In: International Conference on Manufacturing Science and Engineering, China,2015. 9 Dai S J, Zhu Y Y, Chen F. Journal of Chongqing Institute of Technology,2016,30(4),27(in Chinese). 戴世娟,朱远因,陈锋.重庆理工大学学报,2016,30(4).27. 10 Wang Y S. Adsorption and corrosion inhibition of several organic inhibitors on carbon steel in simulated concrete pore solution. Master’s Thesis, Beijing University of Chemical Technology, China,2016(in Chinese). 王怡珊. 模拟混凝土孔隙液中几种有机缓蚀剂在碳钢表面吸附及缓蚀行为研究. 硕士学位论文, 北京化工大学,2016. 11 Liu H Q, Hu J, Zhou X Z, et al. Journal of Surfactants and Detergents,2015,18(6),1025. 12 Xu Y Z, Huang Y, Ying L, et al. Inhibitor Journal of Materials Engineering,2016,44(10),100(in Chinese). 徐云泽, 黄一, 盈亮,等. 材料工程,2016,44(10),100. 13 Wen C S, Yu Y T. Surface & Coatings Technology,2004,176(3),337. 14 Wang B, Xu L N, Li D Y, et al. Journal of Materials Engineering,2017,45(5),38(in Chinese). 王贝, 许立宁, 李东阳, 等. 材料工程,2017,45(5),38. 15 Luo Y J, Luo Y B, Lu T Y, et al. Materials Review A: Review Papers,2016,30(9),92(in Chinese). 罗源军, 罗源兵, 吕太勇, 等. 材料导报:综述篇,2016,30(9),92. 16 Cao C N, Zhang J Q. Introduce of electrochemical impedance spectroscopy, Beijing Science Press, China,2002(in Chinese). 曹楚南, 张鉴清. 电化学阻抗谱导论, 北京科技出版社, 2002. 17 Saeedikhani M, Javidi M, Vafakhah S. Transactions of Nonferrous Metals Society of China,2017,12(3),711. 18 Hu G. The study on dissolution behavior of corrosion processing and fatigue performance after processing for titanium alloy. Master’s Thesis, Nanchang Hangkong University,China, 2011(in Chinese). 胡舸. 钛合金腐蚀加工溶解行为和加工后疲劳性能研究. 硕士学位论文, 南昌航空大学, 2011. 19 Charitha B P, Padmalatha R. Carbohydrate Polymers,2017,168(10),337. 20 Prasad K V S, Prabhakar G, Rao S V M M, et al. Journal of Chemistry,2003,15(2),1170. 21 Li H H. Study of adsorption behavior and electrochemical methods for corrosion inhibitors in acidic solutions. Master’s Thesis, Huadong University of Science and Technology, China, 2006(in Chinese). 李海洪. 酸性介质中缓蚀剂吸附行为与电化学测试方法研究. 硕士学位论文, 华中科技大学,2006. 22 Zhao P. Corrosion inhibition effect of phthalocyanine compounds and goldthread extractive on mild steel and its quantum chemistry research. Master’s Thesis, University of Chinese Academy of Sciences, China, 2005(in Chinese). 赵澎. 酞菁化合物、黄连提取物对碳钢的缓蚀作用及其量子化学研究. 硕士学位论文, 中国科学院研究生院(海洋研究所),2005. 23 Abo M, Alonso A, Sánchez A, et al. Science of the Total Environment,2017,598(10),949. 24 Jin J, Sun K, Wang Z, et al. Science of the Total Environment,2017,598(12),789.