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US 12,584,228 B2Granted
Preparation for pre-treating surfaces by chemically converting oxide layers of titanium or titanium alloys
AssigneeAirbus Operations GmbH
InventorsBenedikt Langer, Tobias Mertens
Life of this patent
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Abstract
A preparation and a process for the surface pretreatment of titanium or titanium alloys containing 200 to 400 g/l NaOH and 10 to 150 g/l MGDA in water, wherein the preparation has a pH of at least 12, and preferably 13, and wherein a content of further substances is less than 1 g/l.
Claims10
A process for a surface pretreatment of articles composed of titanium or titanium alloys, comprising:
- contacting the articles composed of titanium or titanium alloys with a preparation containing 200 to 400 g/l NaOH and 10 to 150 g/l MGDA in water,
- wherein a content of further substances in the preparation is less than 1 g/l,
- wherein a pH of the preparation is at least 12, and
- wherein the contacting is effected for 5 to 60 minutes at 20 to 80° C.
1 more element
Dependencies are inferred from the claim text.