发明申请
- 专利标题: METHOD OF SELECTIVELY STRIPPING AN ENGINE-RUN CERAMIC COATING
- 专利标题(中): 选择发动机陶瓷涂层的方法
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申请号: US11564639申请日: 2006-11-29
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公开(公告)号: US20080121623A1公开(公告)日: 2008-05-29
- 发明人: William Clarke Brooks
- 申请人: William Clarke Brooks
- 申请人地址: US NY Schenectady
- 专利权人: GENERAL ELECTRIC COMPANY
- 当前专利权人: GENERAL ELECTRIC COMPANY
- 当前专利权人地址: US NY Schenectady
- 主分类号: C23F1/16
- IPC分类号: C23F1/16 ; C23F1/30 ; B24C1/00
摘要:
A process for selectively stripping a coating from a component of a turbomachine, and particularly a coating having a ceramic matrix that contains metallic particles dispersed therein that render the coating more difficult to remove from the component after the component has been subjected to elevated temperatures during operation of the turbomachine. The process generally includes immersing the component in an aqueous solution containing ferric chloride, nitric acid, and phosphoric acid, for a duration sufficient to attack the metallic particles in the coating. The component is then removed from the aqueous solution and its surface rinsed of the aqueous solution. The immersing and removing steps are then sequentially repeated a sufficient number of times to sufficiently attack the metallic particles to enable the coating to be mechanically removed from the component.
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