Patent ID: 8580724

Claim:
A metal loss inhibitor concentrate comprising water, (A) an amount of a component of dissolved organic compounds and polymers that contain at least two hydroxy moieties per molecule and an average of at least 0.4 hydroxy moieties per carbon atom; (B) an amount of a thiourea component, wherein the mass of component (A) has a ratio to the mass of component (B) that is from 4.0:1 to 20.0:1.0 by weight; and (C) an amount of a dissolved component containing aryl and quaternary ammonium moieties; and, optionally (D) an amount of a wetting agent, comprising an ethoxylate of an alcohol having a saturated or unsaturated, straight-chain or branched aliphatic having from 12 to 80 carbon atoms, wherein component (A) includes an amount of polyoxyalkylenes having a molecular weight exceeding 250 daltons, the amount of polyoxyalkylenes exceeding 50 wt. % of component (A) and the mass of component (A) has a ratio to the mass of component (C) that is from 4.5:1 to 15:1.