3500-15 127610-01 alizarin sulfonate, dissolved in 5 mL of ethanol is added. After 4 min contact, apply glacial acetic acid until the violet color disappears. Any red spots remaining indicate pores. 9.6.5 Porosity Test for Copper Substrates—Wipe the plated part or specimen with glacial acetic acid. After 3 min, apply a solution of potassium ferrocyanide prepared by dissolving 1 g of potassium ferrocyanide and 1.5 g methyl cellulose in 90 mL of boiling distilled water. The appearance of brown spots after 2 min indicate pores. 9.7 Other Test Methods—Test methods which have been developed that are equal to or better than these may be substituted. The precision and bias requirements will vary for each type of test. If an alternate test is specified it shall be agreed upon between the producer and the purchaser. 10. Rejection and Rehearing 10.1 Part(s) that fail to conform to the requirements of this standard may be rejected. Rejection shall be reported to the producer promptly in writing. In the case of dissatisfaction occurs with the results of a test, the producer may make a claim for a hearing. Coatings that show imperfections may be rejected. 11. Certification 11.1 When specified in the purchase order or contract, the purchaser shall be furnished certification that the samples representing each lot have been processed, tested and inspected as directed in this specification and the requirements have been B 733 – 97 6 met. When specified in the purchase order or contract, a report of the test results shall be furnished. 12. Keywords 12.1 autocatalytic; chemical nickel; coatings; conductive; corrosion resistance; electroless; functional; nickel; nickel phosphorus; wear resistance SUPPLEMENTARY REQUIREMENTS The following supplementary requirements shall apply only when specified by the purchaser in the contract or order. S1.1 Shot Peening—When specified by the purchaser in the ordering information, the part(s) shall be shot peened prior to plating in accordance with Specification B 851 or MIL-S13165. S1.2 Composition—When specified by the purchaser in the ordering information the phosphorus content shall be maintained in the deposit to within 1 %. Use the test methods described in 9.1. S1.3 Inert Atmosphere—When specified by the purchaser in the ordering information, the coating shall be heat treated in a vacuum, inert, or reducing atmosphere to prevent surface oxidation of the coating. S1.4 Hydrogen Embrittlement—When specified by the purchaser in the ordering information the plating process shall be evaluated at the time of processing parts for hydrogen embrittlement using Test Method F 519. S1.5 Abrasive Wear—When specified by the purchaser in the ordering information, the coating shall be tested for abrasion wear resistance using the method in Appendix X1 of this specification. The coating shall meet a maximum wear rate which is specified by the purchaser and agreed to by the producer. S1.6 Adhesive Wear—When specified by the purchaser in the ordering information, the coating shall be tested for adhesive wear resistance using Test Method D 2714 or Test Method D 2670. The wear rate shall be specified by the purchaser and agreed to by the producer. S1.7 Contact Resistance—When specified by the purchaser in the ordering information, the coating shall be tested for contact resistance using Test Method B 667. S1.8 Solderability—When specified by the purchaser in the ordering information, the unaged coating shall pass Test Method B 678 on solderability. S1.9 Corrosion Resistance—When specified by the purchaser in the ordering information the coating shall pass any special corrosion tests agreed to by the producer. The corrosion resistance of the coating to a specific liquid medium can be determined by means of immersion tests (see Practice G 31) or electrochemical test (see Practices G 5 and G 59). S1.10 Pitting Corrosion Resistance—Use Method G 85 (acetic acid-salt spray test), Method B 368 (copper-accelerated acetic acid-salt spray, C |
