Mcgean-Rohco, Inc.

R. O. Hull & Company, Inc.

Rohco, Inc.

Valerie M Canaris

William E Eckles

William J Willis

Vince Opaskar

An additive composition is described with comprises a mixture of

Additive composition, acid zinc and zinc-alloy plating baths and methods

An aqueous acidic zinc-nickel plating bath is described. The plating baths generally comprise

Acid zinc-nickel plating baths and methods for electrodepositing bright

An aqueous acidic plating bath for electrodeposition of tin, lead or tin-lead alloys on a substrate is described. The plating baths are free of fluoborate and comprise (a) at least one bath-soluble metal salt selected from the group consisting of a stannous salt, a lead salt, or a mixture of stannous and lead salts, (b) at least one alkane sulfonic acid or alkanolsulfonic acid, (c) at least one nonionic, cationic or amphoteric surfactant, (d) an effective amount of at least one primary brightening agent selected from the group consisting of aromatic aldehydes, acetophenones, and carbonyl compounds having the general formula

Plating bath and method for electroplating tin and/or lead

Cadmium electroplating baths are described which contain at least one thiourea compound having the general formula:

Cadmium plating baths and methods for electrodepositing bright cadmium

Cadmium electroplating baths are described which contain as a brightening agent, pyridine compounds having the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen, alkyl, alkoxy, alkene, mercapto, amino, halogen, aryl, arylalkyl, aminoalkyl, hydroxy, hydroxyalkyl, cyano, dialkylamide, aldoxime, pyrolidinyl groups and the corresponding N-oxide compounds. Semi-bright to bright level cadmium coatings are obtained with these baths.

An aqueous acidic plating bath for the electrodeposition of a bright zinc deposit on a substrate is disclosed and comprises zinc ions, ammonium ions and at least one aromatic sulfonic acid or salt having the general formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen or lower alkyl groups,

Acid zinc plating baths and methods for electrodepositing bright zinc

An aqueous acid plating bath for electrodeposition of tin, lead or tin-lead alloys on a substrate is described and comprises at least one metal salt selected from the group consisting of a stannous salt, a lead salt or a mixture of stannous and lead salts, and as a brightener agent, an effective amount of at least one alkoxylated amine of the formula ##STR1## wherein R is a fatty acid alkyl group containing from about 8 to about 22 carbon atoms,

Bath and method for electroplating tin and/or lead

The present invention provides an ammonia-free acid zinc plating bath for electrodepositing bright zinc on a substrate in which the zinc deposit produced thereby is ductile and presents a glossy to bright coating on the substrate over a wide cathodic current density range. The ammonia-free acid zinc plating baths of the invention comprise zinc ions, chloride ions, at least one polyoxyalkylated naphthol, at least one aromatic carboxylic acid or bath-soluble salt thereof, and at least one anionic aromatic sulfonic acid or bath-soluble salt thereof. In addition to the above components, the ammonia-free acid zinc plating baths of the invention may contain at least one nonionic polyoxyethylene compound and at least one aromatic aldehyde, ketone, or mixtures thereof. The ammonia-free acid zinc plating baths of the invention are free from significant amounts of complexing agents that would impede the removal of zinc ions from the baths prior to disposal.

Growing community of inventors

Parma, OH, United States of America

Valerie M Canaris