Alkaline stripping solution for stripping off unqualified zinc-nickel alloy plating layer and preparation method and application thereof
By using a strong oxidant and a highly stable complexing agent in an alkaline stripping solution, combined with a highly efficient corrosion inhibitor, the problems of slow speed and substrate corrosion in existing alkaline stripping solutions are solved, achieving a fast and safe removal process for zinc-nickel alloy coatings, suitable for substrate materials such as high-strength steel.
CN122147329APending Publication Date: 2026-06-05AVIC CHENGFEI COMML AIRCRAFT COMPANY
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AVIC CHENGFEI COMML AIRCRAFT COMPANY
- Filing Date
- 2026-04-09
- Publication Date
- 2026-06-05
Smart Images
Figure SMS_1
Abstract
The present application belongs to zinc-nickel alloy plating layer, and particularly relates to an alkaline stripping solution for removing unqualified zinc-nickel alloy plating layer, a preparation method and application thereof. In order to safely and efficiently remove unqualified zinc-nickel alloy plating layer, the present application provides an alkaline stripping solution, which is composed of the following components in terms of mass concentration: main salt: NaOH 100-180 g / L; oxidizing agent: sodium nitrate 180-200 g / L and NaClO 10-20 g / L; complexing agent: salicylaldehyde oxime 30-50 g / L and diethylene triamine 30-50 g / L; corrosion inhibitor: 2-acetylpyrrole or 4-piperidine carboxamide 2-10 g / L; wetting agent: sodium dodecyl sulfate 0.5-1.5 g / L. After the components in the alkaline stripping solution are mixed in proportion, the alkaline stripping solution can be directly used for removing unqualified zinc-nickel alloy plating layer, the stripping rate reaches 0.6-1 um / min, and the stripping temperature range is wide without damaging the substrate.
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