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|Title:||Effect of specific water quality parameters on copper corrosion|
|Authors:||Pehkonen, S.O. |
PH changes and effects
|Source:||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.|
|Appears in Collections:||Staff Publications|
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