| 释义 |
deˌzincifiˈcation
The separation of zinc from an alloy or composition in which it is present. a. spec. Used in connection with Parkes' process for desilvering lead by means of zinc.
1874J. A. Phillips Elem. Metallurgy 586 The dezincification of the de-silverised lead is effected by the aid of chloride of lead. 1891Eissler Metall. Argentiferous Lead 304 As only minute quantities of antimony are contained in the lead, dezincification is sufficient.
b. A type of corrosion that causes copper-zinc alloys to become soft and porous as a result of the leaching out of the zinc.
1898Engineer 15 Apr. 363/3 The deterioration in the strength of Muntz metal bolts was due to a partial dezincification of the metal. 1939Jrnl. R. Aeronaut. Soc. XLIII. 616 In untreated glycol brass was found to suffer attack by ‘dezincification’. 1960U. R. Evans Corrosion & Oxidation of Metals xii. 474 It is today common practice to add 0·02 to 0·06% arsenic to brass condenser alloys..; since this plan has been adopted, dezincification has ceased to be a serious menace. |