Effect of Water Nutrient Pollution on Long-Term Corrosion of 90:10 Copper Nickel Alloy

Materials

Robert E. Melchers¹ 

[1] Centre for Infrastructure Performance and Reliability, The University of Newcastle, Callaghan, New South Wales 2308, Australia

关键词: long-term corrosion;    copper alloys;    Cu-Ni;    bi-modal;    microbiologically-influenced corrosion (MIC);   

DOI  :  10.3390/ma8125443

来源: mdpi

【 摘 要 】

Due to their good corrosion resistance, copper and copper alloys such as 90:10 Cu-Ni are used extensively in high-quality marine and industrial piping systems and also in marine, urban, and industrial environments. Their corrosion loss and pitting behaviour tends to follow a bi-modal trend rather than the classic power law. Field data for 90:10 copper nickel immersed in natural seawater are used to explore the effect of water pollution and in particular the availability of critical nutrients for microbiologically induced corrosion. It is shown, qualitatively, that increased dissolved inorganic nitrogen increases corrosion predominantly in the second, long-term, mode of the model. Other, less pronounced, influences are salinity and dissolved oxygen concentration.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.