APPLICATION OF ORTHOPHOSPHATE ON CORROSION OF POTABLE WATER DISTRIBUTION SYSTEM

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MEHRDADI N.; MORADI FALAH SH.; SOLTAN BAYAZIDI M.

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Journal: INTERNATIONAL JOURNAL OF INDUSTRIAL ENGINEERING AND PRODUCTION MANAGEMENT (IJIE) (INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE) (PERSIAN) Year:2001 | Volume:12 | Issue:1 Page(s): 141-152

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Title

APPLICATION OF ORTHOPHOSPHATE ON CORROSION OF POTABLE WATER DISTRIBUTION SYSTEM

Author(s)

MEHRDADI N. | MORADI FALAH SH. | SOLTAN BAYAZIDI M. | Issue Writer Certificate

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Abstract

Internal corrosion of metallic pipes in addition of distribution systems deterioration, decreases water quality In this paper the effect of orthophosphate inhibitors that is allowable to be applied in potable water distribution system has been studied with notice to water standards. In order to evaluate the effect of the mentioned inhibitors, dynamic polarization curve (Tofel curve) was used. Quality tests on water were carried out to measure the amount of pH, CI-, Alk and acidity. Application of 3ppm dibasic sodium orthophosphate (Na2H PO4. 12H2O) decreased the corrosion rate of St-37 steel in potable water to about 0.13 mpyor 1/5 of initial rate in fresh water. Increasing of this inhibitor to more than 5ppm increased the corrosion rate. 3ppm of zinc orthophosphate decreased the corrosion rate to 2/5 and 8ppm decreased it to 1/5 of initial rate. A mixture of zinc orthophosphate and sodium silicate at 2ppm decreased the corrosion rate to 3/7 of initial rate. The effect of mixture of both dibasic orthophosphate and sodium polyphosphate was more than polyphosphate and less than orthophosphate singly. A mixture of monobasic orthophosphate and sodium silicate decreased the corrosionrate to less than 1/4 of initialrate.

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APA: Copy

MEHRDADI, N., MORADI FALAH, SH., & SOLTAN BAYAZIDI, M.. (2001). APPLICATION OF ORTHOPHOSPHATE ON CORROSION OF POTABLE WATER DISTRIBUTION SYSTEM. INTERNATIONAL JOURNAL OF INDUSTRIAL ENGINEERING AND PRODUCTION MANAGEMENT (IJIE) (INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE) (PERSIAN), 12(1), 141-152. SID. https://sid.ir/paper/65941/en

Vancouver: Copy

MEHRDADI N., MORADI FALAH SH., SOLTAN BAYAZIDI M.. APPLICATION OF ORTHOPHOSPHATE ON CORROSION OF POTABLE WATER DISTRIBUTION SYSTEM. INTERNATIONAL JOURNAL OF INDUSTRIAL ENGINEERING AND PRODUCTION MANAGEMENT (IJIE) (INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE) (PERSIAN)[Internet]. 2001;12(1):141-152. Available from: https://sid.ir/paper/65941/en

IEEE: Copy

N. MEHRDADI, SH. MORADI FALAH, and M. SOLTAN BAYAZIDI, “APPLICATION OF ORTHOPHOSPHATE ON CORROSION OF POTABLE WATER DISTRIBUTION SYSTEM,” INTERNATIONAL JOURNAL OF INDUSTRIAL ENGINEERING AND PRODUCTION MANAGEMENT (IJIE) (INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE) (PERSIAN), vol. 12, no. 1, pp. 141–152, 2001, [Online]. Available: https://sid.ir/paper/65941/en

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