Method for corrosion and scale inhibition
AssigneeRhodia Operations
InventorsRobert Eric Talbot, Jason Grech
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Abstract
The present invention provides a formulation for use in the treatment of corrosion and metal sulphide scale deposits in aqueous systems, said formulation comprising a tetrakis (hydroxyorgano) phosphonium salt (THP+ salt) and a primary, secondary or tertiary alcohol having an acetylenic bond in the carbon backbone. The invention also provides the use of such a formulation for treating corrosion of mild steel, copper or aluminium, and a method for treatment of an aqueous system containing or in contact with a metal sulphide scale while concomitantly inhibiting the corrosion of surfaces in contact with said aqueous system, which method comprises the addition to said aqueous system of a scale and corrosion inhibiting amount of such a formulation.
Claims16
A method for the treatment of an aqueous system containing or in contact with a metal sulfide scale while concomitantly inhibiting the corrosion of surfaces in contact with said aqueous system, said method comprising:
- adding to said aqueous system a scale and corrosion inhibiting amount of an anti-corrosion and anti-metal sulfide scale formulation consisting essentially of a tetrakis (hydroxyorgano) phosphonium salt, a primary, secondary or tertiary alcohol having an acetylenic bond in the carbon backbone, an ammonium salt, and optionally a surfactant, wherein a ratio of the tetrakis (hydroxyorgano) phosphonium salt to the acetylenic alcohol is between 1:1 and 750:1.
Dependencies are inferred from the claim text.