Pretreatment before painting of composite metal structures...

C - Chemistry – Metallurgy – 23 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C23C 22/12 (2006.01) B05D 3/10 (2006.01) C23C 22/34 (2006.01) C23C 22/56 (2006.01) C23C 22/73 (2006.01)

Patent

CA 2303183

In a process for the chemical pretreatment before painting of composite metal structures that contain aluminum or aluminum alloy portions together with steel, galvanized steel and/or alloy-galvanized steel portions, in a first step the metal structure is treated with a zinc phosphating solution that forms a surface-covering crystalline zinc phosphate layer on steel and on galvanized or alloy-galvanized steel, but without forming a zinc phosphate layer on the aluminum portions, and then in a second step the metal structure is brought into contact with a treatment solution that does not excessively dissolve the crystalline zinc phosphate layer on steel, galvanized and/or alloy-galvanized steel, but forms a conversion layer on the aluminum portions.

Dans un procédé de prétraitement chimique, effectué avant de peindre des structures de métal composite renfermant de l'aluminium ou des portions en alliage d'aluminium et d'acier, d'acier galvanisé, et/ou en alliage-acier galvanisé, on traite tout d'abord ladite structure de métal au moyen d'une solution de phosphate de zinc, qui forme une couche de phosphate de zinc cristalline sur la surface de l'acier, de l'acier galvanisé, ou des portions en alliage-acier galvanisé, sans pour autant former une couche de phosphate de zinc sur les portions d'aluminium. Au cours d'une seconde étape, on met ladite structure de métal en contact avec une solution de traitement permettant de ne pas dissoudre excessivement la couche de phosphate de zinc cristalline formée sur l'acier, l'acier galvanisé, et/ou les portions en alliage-acier galvanisé, cette solution étant destinée à former, sur lesdites portions d'aluminium, une couche métallique obtenue par conversion chimique.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Pretreatment before painting of composite metal structures... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pretreatment before painting of composite metal structures..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pretreatment before painting of composite metal structures... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1539887

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.