| 配方类型： |
METALS |
| 配方说明： |
To Seal Porous Light Metal Castings (U.S. Patent 2,680,081) |
| 配方组成： |
Water/To make 100 cc
Chromic Acid/7 g
Potassium Dichromate/5 g
Waterglass/50 cc |
| 配制方法： |
The castings are placed in a vacuum and then in the solution at 95 to 100'C for half an hour at 60 to 80 lb/sq inch pressure. |
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