Abstract: Utilizing 99.99% Cu substrate (1 cm×1 cm×1 mm) as substrate, a series of Ni-Co-B-Pr coating has been synthesized by electroless pla-ting method under varying the ratio of Ni2+/Co2+ and concentrations of Pr3+, and the best corrosion resistance coating was annealed at different temperatures. Use EDX, XRD, SEM and other test methods to characterize and analyze the surface morphology, crystal structure and corrosion resistance of the coating. Tafel curve, immersion method and porosity test were used for corrosion behavior of Ni-Co-B-Pr composite coating. The results show that the Ni-Co-B-Pr coating has an amorphous structure. With the increase of the Ni/Co salts ratio and the Pr3+ concentration, the particles are refined and the cracks of the coating are reduced, but after reaching a certain level, the quality of the coating is reduced. In Tafel curve test (3.5%NaCl solution), the best corrosion resistance was obtained for coating prepared at Ni/Co salts ratio of about 3/2 and Pr3+ concentration of about 3 g/L, in which Eccor is -0.436 V and Icorr is 0.586 A·cm-2. This result is further proved by the immersion method and porosity test. After annealing, the particles of the coating become larger, and the coating changes from amorphous to crystalline. The annealing temperature was 200 ℃, the coating had a best corrosion resistance performance. As the temperature continues to rise, the corrosion resistance of the coating decreases.
1 Ohno I. Materials Science and Engineering: A, 1991, 146 (1-2), 33. 2 Krishnan K H, John S, Srinivasan K, et al.Metallurgical and Materials Transactions A, 2006, 37 (6), 1917. 3 Krishnaveni K, Narayanan T S, Seshadri S.Surface and Coatings Techno-logy, 2005, 190 (1), 115. 4 Hu C, Xu M, Zhang J, et al.Journal of Alloys and Compounds, 2019, 770, 48. 5 Shi Z Y, Wang D Q, Ding Z M.Applied Surface Science, 2004, 221 (1-4), 62. 6 Bekish Y N, Poznyak S, Tsybulskaya L, et al. Electrochimica Acta,2010, 55 (7), 2223. 7 Wang W Y, Yang Y Q, Bao J G, et al. Catalysis Communications, 2009, 11 (2), 100. 8 Nie M, Zou Y, Huang Y, et al.International Journal of Hydrogen Energy,2012, 37 (2), 1568. 9 Santana R, Prasad S, Campos A, et al.Journal of Applied Electrochemistry, 2006, 36 (1), 105. 10 Abdel-Gawad S A, Sadik M A, Shoeib M A.Journal of Alloys and Compounds, 2019, 785, 1284. 11 Qian W, Wei H, Chen H, et al.Surface Engineering, 2019, 35 (2), 144. 12 Campillo B, Sebastian P, Gamboa S, et al.Materials Science and Engineering: C, 2002, 19 (1-2), 115. 13 Wang S.Thin Solid Films,2007, 515 (23), 8419. 14 Gamboa S, Gonzalez-Rodriguez J, Valenzuela E, et al.Electrochi-mica Acta,2006, 51(19), 4045. 15 Bekish Y N, Poznyak S, Tsybulskaya L, et al.Journal of the Electroche-mical Society, 2014, 161 (12), D620. 16 Xuan T P, Zhuang L C, Feng S Z.Journal of Rare Earths, 2006, 24 (1S1), 393. 17 Qian W E I, Chen H, Feng C,et al. Surface Review and Letters,2018, 25 (6), 1950006. 18 Jamali S S, Moulton S E, Tallman D E, et al.Journal of Electroanalytical Chemistry, 2015, 739, 211. 19 Delaunois F, Lienard P.Surface and Coa-tings Technology, 2002, 160 (2-3), 239. 20 Dervos C T, Novakovic J, Vassiliou P.Materials Letters, 2004, 58 (5), 619. 21 Ashassi-Sorkhabi H, Moradi-Haghighi M, Hosseini M.Surface and Coa-tings Technology, 2008, 202 (9), 1615. 22 Li H, Ebrahimi F.Acta Materialia,2003, 51 (13), 3905. 23 Wang K L, Zhu Y M, Zhang Q B, et al.Journal of Materials Processing Technology, 1997, 63 (1-3), 563. 24 Zhang L M, Zhang S D, Ma A L, et al.Corrosion Science, 2018, 144, 172. 25 Liu H, Guo R X, Zong Y, et al.Transactions of Nonferrous Metals Society of China,2010, 20 (6), 1024. 26 Zhang S, Zheng Y,Yuan L,et al.Acta Chimica Sinica, 2013, 71 (12), 1676(in Chinese). 张树金, 郑一雄, 袁林珊, 等. 化学学报,2013, 71 (12), 1676. 27 Khalajhedayati A, Pan Z, Rupert T. Nature Communications, 2016, 7, 10802. 28 Jiang W, Shen L, Xu M, et al. Journal of Alloys and Compounds, 2019, 791, 847. 29 Sun F, Meng G, Zhang T, et al. Electrochimica Acta, 2009, 54(5), 1578. 30 Yasakau K A, Zheludkevich M L, Lamaka S V, et al.The Journal of Physical Chemistry B, 2006, 110 (11), 5515. 31 Walsh F, de León C P, Kerr C,et al. Surface and Coatings Technology, 2008, 202(21), 5092. 32 Gao Y, Zheng Z, Zhu M, et al. Materials Science and Engineering: A, 2004, 381 (1-2), 98.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2021, Vol. 35 
