Corrosion Resistance of a New Cu-Alloy (Low Ni) vis-à-vis Cu-10Ni Alloy in Sulfide Polluted Synthetic Seawater

Abstract:

Cu-10Ni alloy suffers accelerated corrosion in sulfide polluted seawater. As an alternative, a new single phased, Cu-28%Zn-5%Ni-5%Mn-2%Fe alloy (hereby referred as CNZ-alloy) is developed and tested for the corrosion resistance in clean and sulfide polluted synthetic seawater. The CNZ-alloy showed better corrosion resistance than the standard Cu-10Ni alloy in both the test solutions i.e. clean and sulfide polluted synthetic seawater with . The results are discussed on the basis of polarization and electrochemical impedance spectroscopy. The better corrosion resistance of CNZ-alloy is attributed to the formation of protective ZnS and MnS₂ films.

• Periodical: Advanced Materials Research (Volume 585)
• Pages: 488-492
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.585.488
• Online since: November 2012
• Authors: Adeeba F. Khan, Awanikumar P. Patil, T. Subba Rao
• Keywords: Corrosion, Cu-10Ni Alloy, Seawater, Sulfide, ZnS

References

[1] P.K. Chauhan, H.S. Gadiyar, An XPS study of the corrosion of Cu-10 Ni alloy in unpolluted and polluted sea-water; the effect of FeSO4 addition, Corrosion Science. 25 (1985) 55-68.

DOI: 10.1016/0010-938x(85)90088-5

[2] W. Schleich, Typical failures of CuNi 90/10 seawater tubing systems and how to avoid them, Engineering Structures. 0049 (2004).

DOI: 10.1533/9781845693084.2.73

[3] S. Yuan, S. Pehkonen, Surface characterization and corrosion behavior of 70/30 Cu–Ni alloy in pristine and sulfide-containing simulated seawater, Corrosion Science. 49 (2007) 1276-1304.

DOI: 10.1016/j.corsci.2006.07.003

[4] F.P. IJsseling, The application of the polarization resistance method to the study of the corrosion behaviour of CuNi10Fe in sea-water, Corrosion Science. 14 (1974) 97-110.

DOI: 10.1016/s0010-938x(74)80048-x

[5] A.P. Patil, R.H. Tupkary, Development of Single-Phased Copper Alloy for Seawater Applications: as a Cost-Effective Substitute for Cu-10Ni Alloy, Transactions of the Indian Institute of Metals. 61 (2008) 13-25.

DOI: 10.1007/s12666-008-0060-z

[6] A.P. Patil, R.H. Tupkary, Corrosion resistance of new copper alloy containing 29Zn, 10Ni and up to 5Mn vis-a-vis Cu-10Ni in sulphide polluted synthetic seawater, Transactions of the Indian Institute of Metals. 62 (2009) 71-79.

DOI: 10.1007/s12666-009-0010-4

[7] A. Alshawa, AC electroluminescence in Thulium-doped Zinc Sulfide, 1988.

[8] N. Kandasamy, S. Saravanan, Synthesis and Characterization of Mercury doped and un-doped Manganese Sulfide Nanostructure, IEEE. 20 (2011) 104-106.

DOI: 10.1109/iconset.2011.6167922

[9] A.F. Khan, A.P. Patil, T.S. Rao, Effect of zinc addition to copper in improving its corrosion resistance in sulfide polluted synthetic seawater, Transactions of the Indian Institute of Metals. 64 (2011) 99-103.

DOI: 10.1007/s12666-011-0020-x

[10] Adeeba F. Khan, A. P. Patil, T. S. Rao 'Study on corrosion behavior of Cu-Mn alloy in clean and sulphide polluted synthetic seawater', Copper Topics, 36, No. 4, (2011) 2-5.