Novel zinc plating process

Abstract

Abstract AND ANHYDRIDES THEREOF, WHEREIN N IS AN INTEGER 1-4 AND R'''''' IS SELECTED FROM THE GROUP CONSISTING OF A HYDROCARBYL GROUP AND AN INERTLY SUBSTITUTED HYDROCARBYL GROUP. R''"-(COOH)N WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL, ARYL, AND HETEROCYCLIC OXYGEN AND SULFUR RADICALS, AND R'' AND R" ARE EACH SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL RADICALS; AND AT LEAST ONE ORGANIC ACID COMPONENT OF THE FORMULA: O=CH-R, AND R''-C(=O)-R" THIS INVENTION RELATES TO NOVEL COMPOSITION AND TO A PROCESS OF PRODUCING BRIGHT ZINC DEPOSITS WHICH COMPRISES PASSING CURRENT FROM AN ANODE TO A METAL CATHODE THROUGH AN AQUEOUS ALKALINE PYROPHOSPHATE SOLUTION CONTAINING AT LEAST ONE ZINC COMPOUND PROVIDING ZINC IONS FOR ELECTROPLATING ZINC AND AT LEAST ONE ORGANIC CARRIER COMPOUND SELECTED FROM THE GROUP CONSISTING OF: (A) BIS(SULFONAPHTHYL) METHANE AND SALTS THEREOF, (B) NAPHTHALENE DERIVATIVES WHICH CONTAIN SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF SULFONIC ACIDS AND THEIR ALKALI METAL SALTS, HYDROXYL, AMINO, AND IMINO RADICALS, (C) BENZENE DERIVATIVES CONTAINING SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF SULFONIC ACIDS AND THEIR SALTS WITH ALKALI METAL, AMMONIUM, ALKYL, AND IMINO RADICALS, AND (D) ALLYL SULFONIC ACID AND ITS SALTS WITH ALKALI METALS AND AMMONIUM; AT LEAST ONE CARBONYL COMPOUND HAVING A STRUCTURAL FORMULA SELECTED FROM THE GROUP CONSISTING OF:

Inventors

• 👤 C Chan

Bibliographic Details