The corrosion inhibition performance of tungstate, using weight loss method, polarization curve and surface analysis technology to study the corrosion inhibition performance and corrosion mechanism of tungstate composite corrosion inhibitor in seawater on carbon steel (A3), and determine the Tungstate is a corrosion inhibitor formula with good synergistic effect.
The research shows that: the corrosion inhibition rate of single tungstate on carbon steel in seawater increases with the increase of its concentration, the corrosion inhibition rate is low at low concentration, and the corrosion of carbon steel will be accelerated below 40 mg/L; the tungsten in the quaternary composite corrosion inhibitor When the concentrations of tungstate, citric acid, HEDP and zinc salt are 30, 40, 10 and 3 mg/L respectively, the corrosion inhibition rate of A3 steel exceeds 93%; the single tungstate and its compound corrosion inhibitor are all anodic Corrosion inhibitor: After adding corrosion inhibitor, the surface of A3 steel is mainly composed of iron oxide, and tungsten and phosphorus also participate in the formation of insoluble precipitation film, which effectively inhibits the corrosion of carbon steel by seawater.
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