Abstract: An aqueous acid trivalent chromium electroplating solution and process for forming chromium platings employing a bath containing trivalent chromium, formate ions as a complexing agent, and a bath soluble reducing agent selected from the group consisting of formaldehyde, glyoxal, formaldehye bisulfite, glyoxal di-bisulfite, sodium formaldehyde sulfoxylate, and mixtures thereof. The bath may additionally and preferably contain controlled amounts of conductivity salts, ammonium cations and a buffering agent to maintain the pH within the desired range.

Abstract: An improved solution and process for depositing bright zinc coatings employing an aqueous solution containing zinc ions and an effective amount of a brightening agent comprising a bath soluble cationic alkylated condensation polymer obtained by alkylating a condensation polymer of an epihalohydrin and a heterocyclic compound containing at least 2 nitrogen atoms with a trialkyl ammonio-halo-alkyl halide salt.

Abstract: A composition and method for electrodepositing ductile, bright, well leveled copper deposits from an aqueous acidic copper plating bath having dissolved therein from about 0.04 to about 1000 milligrams per liter of a poly (alkanol quaternary ammonium salt) formed as the reaction product of a polyalkanolamine with an alkylating or quaternization agent. The polyalkanolamine constituent typically is formed as the reaction product of a polyalkylenimine (e.g. polyethylenimine) with an alkylene oxide.