| This paper presents the results of a study that was undertaken to optimize the ratio of the components of a new multicomponent inhibitor blend composed of orthophosphate/ phosphonates/ acrylate copolymer/ isothiazolone. Here, Orthophosphate functions as a corrosion inhibitor. Phosphonates function as a corrosion and scale inhibitor. An additional role of the polymer in this blend is the control of scale. On the one hand, isothiazolone is used as a biocide. The effect of newly developed inhibitor was studied through weight-loss tests, electrochemical tests, scale tests, microorganism tests and surface analyses. The obtained results showed that developed inhibitor revealed a very good corrosion, scale and microorganism inhibition simultaneously. Weight-loss tests, electrochemical tests and surface analyses indicated that blended inhibitor acted as anodic and cathodic inhibition forming bi-polar layer contained calcium phosphate, calcium phosphonates, and iron oxide complex. Inhibitor used in this study exhibited crystal modification effect for calcium carbonate scale. In addition, all kinds of microorganisms used in this study were inhibited effectively. |
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