B10 Cu-Ni alloy has good corrosion resistance against seawater. Natural seawater from Xiamen, was used to study the seawater corrosion behaviour of B10 Cu-Ni alloy, H2O2 was added as corrosion accelerator. The whole seawater immersion corrosion simulation experiments were conducted in laboratory. Geometric measurement and electrochemical impedance spectroscopy (EIS) technique were used to obtain the tendency of corrosion rate versus corrosion time. The growth and damage of the oxidation film on the surface of the alloy of 1cm2 working area were characterized by the impedance spectra features with different corrosion time.Scanning electron microscope(SEM), energy spectrum analysis(EDX), X-ray photoelectron spectroscopy(XPS) and raman spectrum were used to analyse the constitution of corrosion product and the corrosion types. The results show that the instantaneous corrosion rate exhibits decreasing first then increasing due to the state of oxidation film. The corrosion products consist of Cu2(OH)3Cl and Cu2O. And the corrosion of B10 Cu-Ni alloy starts with pitting corrosion, then gradually goes through the evolution process of intergranular corrosion to exfoliation.
LIU W H , CAO Z Q , ZHENG Z G . The effect of Cl- content on corrosion electrochemical behavior of CA Cu-40Ni Alloy[J]. Journal of Shenyang Normal University (Natural Science), 2004, 22 (3): 220- 223.
SYRETT B C , MACDONALD D D . The validity of electrochemical methods for measuring corrosion rates of copper-nickel alloys in sea water[J]. Corrosion, 1979, 35 (11): 505- 509.
MELCHERS R E . Temperature effect on seawater immersion corrosion of 90/10 copper-nickel alloy[J]. Corrosion, 2001, 57 (5): 440- 444.
CROUSIER J , BECCARIA A M . Behavior of Cu-Ni alloys in natural sea water and NaCl solution[J]. Materials and Corrosion, 1990, 41 (4): 185- 189.
DHAR H P , WHITE R E , BURNELL G. , et al. Corrosion of Cu and Cu-Ni alloys in 0.5 M NaCl and in synthetic seawater[J]. Corrosion, 1985, 41 (6): 317- 323.
HODGKIESS T , VASSILIOU G . Complexities in the erosion corrosion of copper-nickel alloys in saline water[J]. Desalination, 2005, 183 (1): 235- 247.
DRACH A , TSUKROV I , DECEW J , et al. Field studies of corrosion behavior of copper alloys in natural seawater[J]. Corrosion Science, 2013, 76 (1): 453- 464.
BAUTISTA B E T , WIKIEL A J , DATSENKO I , et al. Influence of extracellular polymeric substances (EPS) from Pseudomonas NCIMB 2021 on the corrosion behavior of 70Cu-30Ni alloy in seawater[J]. Journal of Electroanalytical Chemistry, 2015, 737 (1): 184- 197.
ROSSANA G , MARK A B , JAMES E C , et al. Corrosion behavior of a 2219 aluminum alloy treated with a chromate conversion coating exposed to a 3.5% NaCl solution[J]. Corros Sci, 2011, 53, 1214- 1223.
CHEN H M , ZHAO M M , WANG R C , et al. Corrosion behavior of Al-Zr-Nd alloys in 3.5% NaCl solution[J]. Corrosion and Protection, 2013, 34 (12): 1072- 1076.
LI S H , ZHANG H R , LIU J H . Corrosion behavior of aluminum alloy 2024-T3 by 8-hydroxy-quinoline and its derivative in 3.5% chloride solution[J]. Trans Nonferrous Met Soc China, 2007, 17 (2): 318- 325.
QI X , SONG R G , QI W J , et al. Influence of pH values on passive film-induced stress and susceptibility to stress corrosion cracking in 7050 aluminum alloy[J]. Journal of Materials Engineering, 2016, 44 (5): 86- 92.
CHEN X F. Study on the blistering mechanism of LF6M Al magnesium alloy [C]//Chinese Institute of Corrosion and Protection, Corrosion and Protection of Water Environment Symposium Set. Beijing: Beijing University of Science and Technology Press, 2010.
AN B G, ZHANG X Y, HAN E H. The effect of salt species during the precipitation in the atmosphere on the corrosion of LY12CZ alloy[C]//International Corrosion Council, 15th International Corrosion Congress.Spain: Corrosion Engineering Science & Technology the International Journal of Corrosion Processes & Corrosion Control, 2002.
YANG C , ZHANG H X , GUO W M , et al. Effects of H2O2 addition on corrosion behavior of high strength low-alloy steel in seawater[J]. Journal of Chinese Society for Corrosion and Protection, 2013, 33 (3): 205- 210.
ONES K , HOEPPNER D W . Prior corrosion and fatigue of 2024-T3 aluminum alloy[J]. Corrosion Science, 2006, 48 (10): 3109- 3122.
尹承军. B10合金在模拟海水中的冲刷腐蚀研究[D]. 哈尔滨: 哈尔滨工程大学, 2012.
YIN C J. Erosion-corrosion of 90/10 alloy in artificial seawater [D]. Harbin: Harbin Engineering University, 2012.
CHEN H Y , ZHU Y L . Selective corrosion of BFe10-1-1 alloy in NaCl solution[J]. Corrosion and Protection, 2006, 27 (8): 404- 407.
MA A L , JIANG S L , ZHENG Y G , et al. Corrosion product film formed on the 90/10 copper-nickel tube in natural seawater: Composition/structure and formation mechanism[J]. Corrosion Science, 2015, 91 (1): 245- 261.
MANSFELD F , LIU G , XIAO H , et al. The corrosion behavior of copper alloys, stainless steels and titanium in seawater[J]. Corrosion Science, 1994, 36 (12): 2063- 2095.
WAGNER C D . Handbook of X-ray photoelectron spectroscopy: a reference book of standard data for use in X-ray photoelectron spectroscopy[M]. USA: Perkin-elmer Corporation Physical Electronics Division, 1992.