Abstract
Some necessary properties required of the compounds generally used in barrel finishing are investigated.
The result obtained is as follows:
(1) The compound with good lubricity is suitable for brightening and polishing soft metal except iron and steel, s. g. copper alloys or zinc alloys. But the lubricity is not necessary for deburring and cutting of iron and steel.
(2) In barrelling, chemical polishing is unnecessary, but the compound which produces phosphate film on iron and steel is effective to improve the abrasion.
(3) pH value of the compound solution must be maintained within the range not to corrode the base metal.
(4) Surface tention of the compound solution has nothing to do with the finishing effect.
