Method for conversion treating surface of magnesium alloy workpiece
US9416454B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 10, 2014 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Nov 22, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G1/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for conversion treating a surface of a magnesium alloy workpiece includes the following steps: providing a magnesium alloy workpiece, degreasing the magnesium alloy workpiece, acid pickling the magnesium alloy workpiece in a first acid pickling treatment step, surface conditioning the magnesium alloy workpiece in a first surface conditioning treatment step, acid pickling the magnesium alloy workpiece in a second acid pickling treatment step, surface conditioning the magnesium alloy workpiece in a second surface conditioning treatment step, pre-phosphating the magnesium alloy workpiece in a pre-phosphating treatment step, and phosphating the magnesium alloy workpiece in a phosphating treatment step to form a phosphating film on the surface of the magnesium alloy workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.