Electrodeposition baths containing calcium salts

Details Electrodeposition baths containing calcium salts Electrodeposition baths containing calcium salts

C - Chemistry, Metallurgy

25

D

C25D 13/06 (2006.01) C09D 5/44 (2006.01) C25D 13/10 (2006.01)

Patent

CA 2333968

Disclosed are improved electrodeposition bath compositions comprising a resinous phase dispersed in an aqueous medium, the resinous phase being comprised of an active hydrogen containing ionic electrodepositable resin and a curing agent, where the improvement comprises the addition to a lead-free electrodeposition bath of at least one calcium compound in an amount of about 10 to 10,000 parts per million of total calcium and not more than about 200 parts per million soluble calcium, based on electrodeposition bath weight. The electrodeposition bath compositions are preferably cationic and provide for excellent corrosion resistance over a variety of metal substrates including untreated steel. Also disclosed is a method of electrocoating a conductive substrate using the improved electrodeposition bath compositions of the invention. Metallic substrates which are coated using the method of the invention are also disclosed.

L'invention porte sur des compositions améliorées pour bains d'électrodéposition comportant une phase résineuse dispersée dans un milieu aqueux, consistant en une résine ionique électrodéposable contenant de l'hydrogène actif, et un durcisseur. Les améliorations consistent en l'adjonction à un bain exempt de plomb d'au moins d'un composé calcique à raison d'environ 10 à 10 000 parties pour 1 million de calcium total, et de moins d'environ 200 parties pour 1 million de calcium de soluble, sur la base du poids total du bain d'électrodéposition. Ces compositions, de préférence cationiques, confèrent une excellente résistance à la corrosion à différents substrats métalliques dont l'acier non traité. L'invention porte également sur un procédé de revêtement électrolytique sur substrat électroconducteur à l'aide des compositions améliorées de l'invention, et sur des substrats métalliques ainsi revêtus.

Affiliated with

Also associated with

Rating

Electrodeposition baths containing calcium salts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrodeposition baths containing calcium salts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrodeposition baths containing calcium salts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1379629