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EDTA-hydroxylamine sulfate-Fe: an efficient corrosion inhibitor system for an industrial crystallization plant

Corrosion, ISSN: 0010-9312, Vol: 50, Issue: 11, Page: 886-897
1994
  • 11
    Citations
  • 0
    Usage
  • 12
    Captures
  • 0
    Mentions
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    11
    • Citation Indexes
      11
  • Captures
    12

Article Description

Unexpected corrosion problems that arose in a crystallization plant with evaporators made entirely of type 316L (UNS S31603) stainless steel (SS) were solved using a corrosion inhibitor system of ethylenediaminetetraacetic acid (EDTA)-hydroxylamine sulfate (Sl)-iron anions (Fe). An experimental statistical plan reduced the number of experiments needed to optimize the concentration of EDTA-Sl-Fe. Moreover, the plan allowed more rapid and economical study of the action of each component in the inhibition mechanism. Statistical processing of the data collected from the potential-vs-time, anodic, and cathodic potentiodynamic measurements permitted estimations of the influence of each independent variable (EDTA, Sl, and Fe concentrations). Voltammetric, polarographic, anodic potentiodynamic curves, and Flade potential measurements helped further understanding of the inhibiting system.

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