Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Reexamination Certificate
2006-05-04
2010-11-09
King, Roy (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
C148S243000, C148S275000, C148S276000, C148S277000, C148S284000, C148S285000, C106S014050, C106S014110, C106S014210
Reexamination Certificate
active
07828911
ABSTRACT:
A method for producing coloured layers on zinc, aluminium, magnesium or alloy surfaces. The surfaces are brought into contact with an aqueous treatment solution which is devoid of chrome, said solution containing, in total, 3-35 g/l persulfate ions and/or peroxodisulfate ions and not more than 10 g/l ammonia or ammonium ions, it has a pH value in the region of between 10-12 and a temperature in the range of between 30-80 ° C. The surfaces are brought into contact with the treatment solution for a period in the region of 0.5-5 minutes and optionally, they are covered with a coating based on organic polymers. The invention further relates to metal parts treated according to said method.
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Salt spray testing (DIN 50 021) Beuth Verlag GmbH, Berlin, pp. 1-6 (1988).
Bastian Marco
Gentschev Pavel
Jueptner Ulrich
Schweinsberg Matthias
Cameron Mary
Henkel AG & Co. KGaA
King Roy
Zheng Lois
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