Corrosion control for water systems using passivators and a hydroxycarboxylic acid
AssigneeChemtreat, Inc.
InventorsRajendra Prasad KALAKODIMI, Santanu BANERJEE, Patrick WOOD, Deann C. GUY, Curt TURNER
Life of this patent
Estimating the term…
Abstract
Methods and compositions for suppressing corrosion of a corrodible metal surface that contacts a water stream in a water system. The method comprises introducing into the water stream a treatment composition, the treatment composition including a combination of passivators and a hydroxycarboxylic acid promoter.
Claims19
A method of suppressing corrosion of a corrodible metal surface that contacts a water stream in a water system, the method comprising:
- adding to the water stream (i) a combination of passivators that include at least two multivalent salts selected from the group consisting of manganese, tungstate, aluminum, and tin, and (ii) a hydroxycarboxylic acid promoter, the hydroxycarboxylic acid promoter having a carboxylic acid group and a hydroxyl group that is bonded to a carbon atom that is adjacent to the carboxylic acid group.
A method of suppressing corrosion of a corrodible metal surface that contacts a water stream in a water system, the method comprising:
- adding to the water stream (i) a combination of a tin salt and an aluminum salt and (ii) a hydroxycarboxylic acid promoter that is selected from the group consisting of tartaric acid, glucaric acid, glucoheptonate, and gluconic acid.
Dependencies are inferred from the claim text.