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US 2023/0407487 A1Published application
Etchant and method of surface treatment of aluminum or aluminum alloy
AssigneeC.Uyemura & Co., Ltd.
InventorsTakuma Maekawa, Katsuhisa Tanabe, Sayuri Tanaka, Fuminori Shibayama
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Abstract
The present invention aims to provide an etchant that can provide good deposition of a metal plating such as a nickel plating, despite its acidity, and a method of surface treatment of aluminum or an aluminum alloy using the etchant. Included is an etchant containing a zinc compound and a fluorine compound and having a pH of 4.5 to 6.5.
Claims11
An etchant, comprising
- at least one zinc compound and
- at least one fluorine compound,
- the etchant having a pH of 4.5 to 6.5.
Dependencies are inferred from the claim text.