Tungstate based corrosion inhibitors

Details Tungstate based corrosion inhibitors Tungstate based corrosion inhibitors

2005-04-25

2008-07-22

Douyon, Lorna M. (Department: 1796)

Compositions

Electrically conductive or emissive compositions

C252S387000, C252S394000, C071S028000, C071S029000, C071S030000

Reexamination Certificate

active

07402263

ABSTRACT:
A trace amount of a tungstate is disclosed for inhibiting corrosion by nitrogen fertilizer solution, in particular, an ammonium nitrate fertilizer solution, (UAN) in contact with ferrous metal storage tanks, piping, and equipment surfaces. Tungstate added with a dispersant polymer is also effective for inhibiting corrosion.

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English abstract of Zhavoronkova et al., “Corrosion of materials in urea-ammonium mixtures,” Cherepovets. Azotmotukovyi Zavod, Cherepovets, USSR, Khimozatsiya Sel'skogo Khozyaistva, 1989, vol. 6, pp. 48-49.
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