Rust-stabilizer based on tannic acid

摘要

Stabiliser also contains a chelation catalyst (C) and a cross-linking (A) agent, in which the tannic acid is a pyrogallic, gallic, meta-polygallic, or ellagic tannin, glucoside, or ester with quinic acid. (C) may be an inorganic strongly electrophilic lewis acid. (A) may be an at least bifunctional organic compound which reacts with the tannic acid and 2 or more molecules of ferri-tannic chelate. Also present may be volatile and non-volatile solvents, and water.