Chemtreat, Inc.

Tzongyeu Du

Rajendra Prasad Kalakodimi

Joseph Clatterbuck

Methods are described for preventing corrosion in a corrosion-aggressive media. The methods include combining a stannous corrosion inhibitor composition with a corrosion-aggressive media (such as a nitrogen-based solution, or more specifically a liquid solution of AN or UAN) to provide a treated solution. The stannous corrosion inhibitor composition may include a caustic. Also described is a liquid including from 0.1 wt % to 25 wt % of a stannous salt and from 1 wt % to 50 wt % of a caustic, and a liquid composition including a solution of urea ammonium nitrate and a stannous material. The liquid and stannous corrosion inhibitor compositions substantially prevent corrosion of a metal surface even when used in very small amounts and at a low pH.

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Glen Allen, VA, United States of America

Tzongyeu Du