1、MIL-P-18317 (Nord) 22 December 1954 SUPERSEDING NAVORD OS 1671 (in part)* MILITARY SPECIFICATION PLATING, BLACK NICKEL (ELECTRODEPOSITED) . ON BRASS, BRONZE, OR STEEL 1. SCOPE 1.1 Scope.- This specification covers one type, class, and grade omtin;,- black nL(electrodeposited) for black- ening brass,
2、 bronze and stee and perforating of the articles, have been completed. 3.3.2 Intermediate coating.- When specified in the contract or order (See 6.21, an intermediate coating such as nickel plat- ing shall be appliedto the steel basis met.al for. the purpose of improving the corrosion protection,. 3
3、.4 Detail requirements.- 3.4.1 Color of %he deposit.- The deposit shall be a uniform black color which shall conform to the color of the standard sample approved under 4.2.1. 3.4.2 Coverage of the deposit.- The black nickel plating shall Completely cover all surfaces designed on the applicable drawi
4、ngs (for example ail siarfaces where reduction of light reflection is desiredj . 3.4.3 Adhesion.- The black nickel platjng shall not separate from the basis metal or the intermediate coatings and the inter- mediate coating from the basis metal at the interfaces and shall not crack, peel, or chip whe
5、n subjected to the adhesion test in 4.4.2 and to handling likely to be encountered in production, shipping, use, or overhaul of equipment. The interface between the black nickel plating and the basis metal or an internediate coating in the surface of the basis metal or the interinediate coating befo
6、re painting. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-18317 (Hom) 3.5 Workmanship.- The workmanship shall be in accordance with high grade commercial practice as required by conditions of use and for good appearance. The plating shall
7、be smooth, adherent, and free from powde:y deposits, blisters, pits, nodules, and indications of burning, 4. QUALITY ASSURANCE PROVISIONS 4.1 Lot.- A lot of plated aptidles shall consist of parts of approximately the same size and shape, plated as defined in 6.3, and submitted for inspection at one
8、time, 4.2 Sampling.- 4.2.1 Standard Sample,- Prior to production, six specimens of the black nickel plating shall be prepared at the same time and shall be uniform in appearance.- Three shall be sub- mitted to the inspector and three shall be retained by the manufacturer. After approval, the specime
9、ns retained by the manufacturer shall be considered standard color samples for subsequent production. The specimens retained by the manu- facturer shall be carefully stored to avoid contamination of the surface and change in color. 4.22 Lot acceptance samples.- 4.2.2.1 For visual inspection.- Sample
10、s of each lot of plated articles shall be selected in accordance with the pro- visions of Standard MIL-STD-105 for visual inspection in accordance with 4.2.2 thru 4.2.2.2.1 inclusive. 4.2.2.2 For adhesion test.- A random sample of four items shall be taken from each inspection lot by the inspector f
11、or the adhesion test in 4.4.2 or four separately pla.ted speci- mens shall be prepared in accordance with 4.2.2.2,lto represent the applicable tests for each inspection lot, If the number of the items in the inspection lot ig four or less the number of items in the sample shall be determined by the
12、procuring activity or left to the discretion of the inspector, 4.2.2.2.1 Separate specimens.- When the plated articles are of such form as to be not readily adaptable to the adhesion test or at the discretion of the inspector for the sampling of small lot sizes for a destructive (adhesion) test, the
13、 test may be made by the use of separate specimens plated concurrently with the articles represented, The separate specimens shall be of a basis metal equivalent to that of the articles represented. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-“
14、Equivalent“ basis metal inclades cherr-icai :mpzsltion and fin- ish of surface prior to Platin3 unless otherwise approved by the Government inspector. The separate zpeci:xs may be strips approxzmately 1-inch wide, 4-inches Iocg, mi C. and the fact that the Government may have formulated, furnished o
15、r in any way supplied the said drawings, specifications, OP other data is not to be regarded by implication or otherwise as in any manner licensing the holder or any other person or corp- oration, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
