Use of Alkane Sulphonic Acid for Rust Removal
AssigneeArkema France
InventorsJean-Alex Laffitte, Bernard Monguillon
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Abstract
The present invention relates to the use of at least one alkane sulphonic acid, with formula R—SO3H, where R represents a saturated, linear or branched hydrocarbon chain, comprising 1 to 4 atoms of carbon for removing rust from all types of surface, in particular from metal surfaces, specifically iron, steel and others. The invention also relates to a method for cleaning rust from all types of surfaces using at least one alkane sulphonic acid.
Claims10
The use of at least one alkanesulfonic acid of formula R—SO3H, where R represents a saturated and linear or branched hydrocarbon chain comprising from 1 to 4 carbon atoms, for the removal of rust.
A process for removing rust, comprising at least one stage in which an effective amount of at least one alkanesulfonic acid, preferably methanesulfonic acid, is brought into contact with the rust to be removed, by contact, immersion, sprinkling, spraying or application of a more or less thick layer, optionally using appropriate tools known to a person skilled in the art (brushes, including fine brushes, spatulas and others), said stage of bringing into contact being optionally followed by one or more stages of rinsing and/or drying.
Dependencies are inferred from the claim text.