METAL LOSS INHIBITOR FORMULATIONS AND PROCESSES

摘要

In one embodiment, a metal loss inhibitor concentrate is provided which contains 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; and (C) an amount of a dissolved component containing aryl and quaternary ammonium moieties; and, optionally: (D) an amount of a wetting agent, such as a component of an ethoxylate of an alcohol having Formula R?1#191-OH wherein R?1#191 is a saturated or unsaturated, straight-chain or branched aliphatic having from 12 to 80 carbon atoms. Such solutions form useful inhibitor concentrates when combined with aqueous chelating cleaning solutions, wherein such solutions, when contacted with a metal surface, are effective in removing scale, smut and other deposits from the metal surface but exhibit a reduced tendency to attack or unduly etch the metal itself, or to inhibit the subsequent desired oxidation and dissolution of metallic copper deposits.