Corrosion control compositions and methods of mitigating corrosion
AssigneeEcolab USA Inc.
InventorsAna Ferrer Carrera, Yolanda Maria De-Abreu
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Abstract
Corrosion inhibitor compositions are provided that can include a mixture of one or more alkaline earth metals, one or more organic phosphates, one or more inorganic phosphates, optionally a dispersant, and hydroxyphosphono acetic acid and/or salts thereof and/or derivatives of hydroxyphosphono acetic acid and/or salts thereof. Methods of mitigating or inhibiting corrosion of metal surfaces are also disclosed. The methods can include the steps of adding a corrosion inhibitor composition as described in the present disclosure to a medium in contact with the metal surface and optionally to the metal surface before it is contacted by the medium.
Claims10
A method of inhibiting corrosion of a metal surface in contact with a medium, comprising:
- adding an effective amount of a mixture into the medium, the mixture comprising:
- one or more alkaline earth metals at a concentration of about 3% to about 20% by weight,
- water at a concentration of about 0.1% to about 70% by weight,
- one or more organic phosphates at a concentration of about 0.1% to about 40% by weight, and
- one or more inorganic phosphates at a concentration of about 0.1% to about 40% by weight;
- and
- adding an effective amount of hydroxyphosphono acetic acid and/or salts thereof and/or derivatives of hydroxyphosphono acetic acid and/or salts thereof into the medium,
- wherein the one or more alkaline earth metals comprises magnesium at a concentration of about 3% to about 20% by weight.
Dependencies are inferred from the claim text.