化学配方数据库
| 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 100C for half an hour at 60 to 80 lb/sq inch pressure. |
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