Vapor phase corrosion inhibitors and method for their production
AssigneeEXCOR Korrosionsforschung GmbH
InventorsGeorg Reinhard, Urte Ludwig, Gerhard Hahn
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Abstract
The present invention relates to new substance combinations as vapor phase corrosion inhibitors for protecting a broad range of customary utility metals, including iron, chromium, nickel, tin, zinc, aluminum, copper, magnesium and their alloys, against corrosion in humid climates. Said substance combinations comprise (1) at least one C6 to C10 aliphatic monocarboxylic acid, (2) at least one C6 to C10 aliphatic dicarboxylic acid, and (3) a primary aromatic amide. Preferably they further comprise (4) an aliphatic ester of hydroxybenzoic acid, in particular of 4-hydroxybenzoic acid, and/or (5) a bemzimidazole, in particular a benzimidazole substituted on the benzene ring.
Claims18
A corrosion-inhibiting substance combination capable of evaporating or sublimating, which contains:
- (1) at least one C6 to C10 aliphatic monocarboxylic acid,
- (2) at least one C6 to C10 aliphatic dicarboxylic acid,
- (3) a primary aromatic amide, and
- (4) an aliphatic ester of hydroxybenzoic acid.
A method for producing a corrosion-inhibiting substance combination capable of evaporating or sublimating, in which (1) one or more C6 to C10 aliphatic carboxylic acids, (2) one or more C6 to C10 aliphatic dicarboxylic acids, (3) one primary aromatic amide or more, (4) an aliphatic ester of hydroxybenzoic acid and optionally (5) a benzimidazole are mixed together.
Dependencies are inferred from the claim text.