Metal treatment – Compositions – Heat treating
Patent
1983-01-11
1984-04-24
Silverberg, Sam
Metal treatment
Compositions
Heat treating
C23F 900
Patent
active
044446012
ABSTRACT:
Substrates, especially those having plated metal surfaces, are subjected to passivation treatments in baths that incorporate one or more film-forming agents at least one of which does not require chromium and includes anions or cations of elements other than chromium. Typically, the anions or cations are introduced as bath-soluble salts which react with the plated surface of the substrate to form an adherent, coherent passivation surface film. Also present within these baths are a source of hydrogen ions and a bath-soluble carboxylic acid or derivative activator for enhancing the rate of the passivation reaction. Articles passivated in baths incorporating these film-forming agents have a hydrophobic surface that exhibits corrosion resistance and that typically has a bright finish.
REFERENCES:
patent: 1723067 (1929-08-01), Pacz
patent: 1798218 (1931-03-01), Pacz
patent: 2046061 (1936-06-01), Curtin
patent: 2318559 (1943-05-01), Percival
patent: 2785097 (1957-03-01), Godspeed
patent: 2805969 (1957-09-01), Godspeed
patent: 2819193 (1958-01-01), Rausch
patent: 2935431 (1960-05-01), Shaw
patent: 3649371 (1972-03-01), Tongyai
Richardson Chemical Company
Silverberg Sam
LandOfFree
Metal article passivated by a bath having an organic activator a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Metal article passivated by a bath having an organic activator a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal article passivated by a bath having an organic activator a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-114195