Impact of iron oxide (rust) on the performance of calcium phosphate scale inhibitors for industrial water systems

• Z. Amjad

Division of Mathematics and Sciences, 2020 E. Maple Street, North Canton, OH 44270, USA

Abstract: The inhibition of calcium phosphate precipitation by homo- and copolymers containing different functional groups has been examined in aqueous solution. It has been found that polymer performance as calcium phosphate inhibitor depends upon polymer architecture. The influence of iron oxide (Fe2O3, rust) on the performance of calcium phosphate inhibitors has also been investigated. Results show that addition of small amount (10 mg to 100 mg) of Fe2O3 to the calcium phosphate supersaturated solution exhibits marked antagonistic effect on inhibitor performance. Various mechanism(s) have been proposed to explain the negative impact of Fe2O3 on inhibitor performance.

Keywords: calcium phosphate, precipitation, inhibition, polymers, iron oxide (rust).

Int. J. Corros. Scale Inhib., 2014, 3, no. 3, 177–189 PDF (642 K)
doi: 10.17675/2305-6894-2014-3-3-177-189

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