| 摘要 |
FIELD: mining.SUBSTANCE: tip adapter (2) comprises long body (4) with outer and inner surfaces. Outer surface first part (17) is furnished with first antirust coat while second part of outer and/or inner surface is provided with second antirust coat. First antirust coat is a chromium ply while second antirust coat is a conversion ply. Note here that said conversion ply contains zinc phosphate zing and manganese phosphate or manganese phosphate. Conversion ply is oiled or polished with wax paste. Besides, invention covers the drilling machine with tip adapter (2).EFFECT: antirust protection of tip adapter.11 cl, 4 dwg |
