Compositions for the treatment of magnesium alloys

Details Compositions for the treatment of magnesium alloys Compositions for the treatment of magnesium alloys

2006-08-22

2006-08-22

King, Roy (Department: 1742)

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Treating substrate prior to coating

C205S199000, C205S210000, C205S224000, C205S321000

Reexamination Certificate

active

07094327

ABSTRACT:
The invention relates to a composition for treating magnesium alloys aimed at improving the resistance thereof to corrosion. The composition is an aqueous solution with a pH ranging between 7 and 10, containing a niobium salt, hydrofluoric acid, and optionally a zirconium salt, phosphoric acid, and boric acid. The alloy is treated in an electrochemical cell in which said alloy acts as an anode. The cell contains an inventive composition at a temperature between 20° C. and 40° C. as an electrolyte. An initial voltage which is sufficient to create a current density between 1.5 and 2.5 A/dm2is applied to the cell, whereupon the voltage is progressively increased to a level ranging between 240 and 330 V in order to maintain the initial current density.

REFERENCES:
patent: 4031027 (1977-06-01), Kessler
patent: 4942024 (1990-07-01), Sasaki et al.
patent: 4978432 (1990-12-01), Schmeling et al.

Affiliated with

Also associated with

Rating

Compositions for the treatment of magnesium alloys does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compositions for the treatment of magnesium alloys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compositions for the treatment of magnesium alloys will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3661126