Maruthamuthu, S. and Ponmariappan, S. and Indiral, K.R. and Subramanian, A. and Rengaswamy, N.S.
(2000)
Interference between biocides and inhibitors in cooling water systems.
Bulletin of Electrochemistry , 16 (5).
pp. 209-213.
ISSN 0256-1654
Abstract
Most of the industries are adding biocide and inhibitors at the same point in cooling water systems. Inhibitors are added continuously and biocides are added weekJy once or once in fifteen days. It is not known as to wh.etber intel-ference effect between biocides and inhibitors will lead to any adverse effect. The present study bas been undertaken to know the influence of biocides on corrosion. Besides, to avoid the interference between biocides and inhibitors, some experiments have been carried out. Formaldehyde, Ethylene diamine tetra acetic acid (EDTA) and Cetryl trimethyl ammonium bromide (CTAB) have been evaluated for their biocidal efficiency. Further, the role of biocides on corrosion in the presence of inhibitors (morpholine phosphate + Zinc) has been im'estigated. From the corrosion point of view, morpholine phosphate with zinc acts as "very good mixed inhibitor". MOI-pholine pho phatc when used alone acts as a good biocide, but when combined with zinc, the killing efficiency was nil. Results suggest that bacteria should be killed first and inhibitors should be added later for getting higher efficiency and for avoiding the interference between biocides and inhibitors.
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