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https://scholarbank.nus.edu.sg/handle/10635/91940
Title: | Effect of specific water quality parameters on copper corrosion | Authors: | Pehkonen, S.O. Palit, A. Zhang, X. |
Keywords: | Bicarbonate Chloride Copper Corrosion potential Corrosion rate Passivation potential PH changes and effects Tafel analysis |
Issue Date: | Feb-2002 | Citation: | Pehkonen, S.O.,Palit, A.,Zhang, X. (2002-02). Effect of specific water quality parameters on copper corrosion. Corrosion 58 (2) : 156-165. ScholarBank@NUS Repository. | Abstract: | The objective of this study is to clearly understand the effect of specific water quality parameters like pH, dissolved oxygen (DO), conductivity, and buffering capacity (attributable to dissolved inorganic carbon [DIC] species) on copper corrosion. These parameters were studied by carrying out bench scale studies in a batch reactor. In the absence of any active chemical species and oxidants except O2 and H+, the corrosion rate and passivation of the copper surface was strongly dependent on the DO at a given pH. Pertinent aqueous-phase chemical speciation, which was calculated by Mineql+ software, was used to explain the experimental results. The effect of chloride (Cl-) and DIC on the initial and short-term corrosion rates was also investigated. Poientiodynamic polarization scans were used not only to determine corrosion rates but also to study the passivation of the copper surface as a function of DIC and Cl- concentrations at different pH values. The mode of corrosion inhibition (i.e., anodic, cathodic, or mixed) with changes in the aqueous-phase chemical speciation was also investigated using electrochemical techniques. | Source Title: | Corrosion | URI: | http://scholarbank.nus.edu.sg/handle/10635/91940 | ISSN: | 00109312 |
Appears in Collections: | Staff Publications |
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