【国外标准】 Standard Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys (Withdrawn 2010)

These test methods for the chemical analysis of metals and alloys are primarily intended to test such materials for compliance with compositional specifications. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.1.1 These test methods cover procedures for the chemical analysis of copper-nickel and copper-nickel-zinc alloys having chemical compositions within the following limits:Includes cobalt.In the case of copper-base alloys containing 5 % and over of zinc, the zinc is usually calculated by difference.Element Concentration Range,%Copper 40 and overNickel 10 to 50Zinc 0 to 40Lead 0 to 15Tin 0 to 10Iron 0.00 to 2Manganese 0.00 to 2Cobalt 0.00 to 0.5Whenever possible the technique and procedures for analysis should be checked against a National Institute of Standards and Technology standard sample having a composition comparable to the material being analyzed.1.2 The test methods appear in the following order:Periodate (Photometric)Method SectionsCobalt: Alpha-Nitroso-Beta-Naphthol Method 26 to 28Nitroso-R-Salt (Photometric) Method 29 to 37Copper, or Copper and Lead Simultaneously, by the Electrolytic Method 2aIron: Dichromate Method 38 to 40Thiocyanate (Photometric)Method 2aSalicylate (Photometric)Method 2aLead: Electrolytic Method 12 to 15Sulfate Method 2 bManganese: Persulfate Method 2 b59 to 66Nickel by the Dimethylglyoxime Method 2aTin by the Iodimetric Titration Method 2bZinc by the Oxide or Ferrocyanide Method 2a1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For precautions to be observed in these test methods, refer to Practices E 50.