| 配方类型： |
METALS AND THEIR TREATMENT |
| 配方说明： |
Coloring Copper Gray |
| 配方组成： |
Immersion time/5 to 10 sec.
If you want a scratch-brushed finish, immerse the part in the
arsenic trioxide solution, rinse, brush wet, and re-immerse for
recoloring. The coating is a displacement film of arsenic which has
relatively little resistance to abrasion.
Formula No.
Ferric chloride (6H4O) or ferric sulfate (9H2O)/15 oz/gal
Immersion time/10 sec.
Hydrochloric acid (35%)/1 gal
Arsenic trioxide/13 to 14 oz/gal
Arsenic trioxide/4 oz/gal
Hydrochloric acid (1.20 sp gr)/8.5 fl oz/gal
Sulfuric acid (1.84 sp gr)/2 fl oz/gal
Temperature/70 to 80'F
Temperature/70 to 80'F |
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