| 摘要 |
The electrolytes comprise 50-80g/l-H2O acid sodium pyrophosphate, and 0.1-10g/l-H2O sodium silicofluoride or potassium silicofluoride, and 1l water. The ceramic is coated by dipping aluminium or aluminium alloy as an anode into electrolytes and doing spark discharge at 3-5A/dm2 electric density and 150-210V.
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