ASTM C715-1990(2011)e1 Standard Test Method for Nickel on Steel for Porcelain Enameling by Photometric Analysis《用光度计分析法测定搪瓷用钢表面镍的标准试验方法》.pdf
《ASTM C715-1990(2011)e1 Standard Test Method for Nickel on Steel for Porcelain Enameling by Photometric Analysis《用光度计分析法测定搪瓷用钢表面镍的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C715-1990(2011)e1 Standard Test Method for Nickel on Steel for Porcelain Enameling by Photometric Analysis《用光度计分析法测定搪瓷用钢表面镍的标准试验方法》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C715 90 (Reapproved 2011)1Standard Test Method forNickel on Steel for Porcelain Enameling by PhotometricAnalysis1This standard is issued under the fixed designation C715; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、 the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTETest Method was corrected editorially in 2011INTRODUCTIONThe test is designed to give a sufficiently accurate an
3、d rapid test of the amount of nickel depositedon sheet steel for enameling plant control work via a photometric method. However, the approxima-tions used in the method prevent its use where extremely accurate nickel determinations are required.The method is applicable to control the weight of nickel
4、 coating on the metal.1. Scope1.1 This test method covers the determination of the amountof nickel deposited on sheet steel during its preparation forporcelain enameling. It is a photometric method commonlyused on production parts and is suitable for determining theheavier nickel deposits that may b
5、e obtained during theprocessing of steel for one-coat enameling.NOTE 1An alternative X-ray emission spectrometry method is TestMethod C810.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to
6、 establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C810 Test Method for Nickel on Steel for Porcelain Enam-eling by X-Ray Emission SpectrometryE30 Test Methods for Chemical Analysis of
7、 Steel, CastIron, Open-Hearth Iron, and Wrought Iron3E60 Practice for Analysis of Metals, Ores, and RelatedMaterials by Molecular Absorption Spectrometry3. Significance and Use3.1 This test method is primarily used to control the nickeldipping operation to ensure that the desired level of nickeldepo
8、sition is attained. It is also used to prepare test plates usedfor calibration in Test Method C810.4. Apparatus4.1 Photoelectric Photometer, conforming to Practice E60.4.2 Weighted Rubber Ring Assembly, required to confinestripping agents to a definite area, consisting of a moldedrubber ring and a m
9、etal outer ring. The rubber ring shall havean inside diameter of 1.35 in. (34.3 mm) in order to encircle anarea of 0.01 ft2(0.000929 m2), a wall configuration as shownin Fig. 1, and the lower portion beveled at a 45 angle (0.78rad) to reduce the contact area and ensure a better seal. Themetal outer
10、ring shall weigh about 3.5 lb (1.5 kg), suitablymachined to fit over the top of the rubber ring as shown in Fig.1.4.2.1 The exact area covered by the rubber ring willgradually increase as the rubber ring itself is consumed by theacid reagent used. In the most accurate analysis, the area etchedby the
11、 rubber ring shall be calculated occasionally, factoredagainst the prescribed area, and that number applied to thereading obtained from the graph.1This test method is under the jurisdiction ofASTM Committee B08 on Metallicand Inorganic Coatings and is the direct responsibility of Subcommittee B08.12
12、 onMaterials for Porcelain Enamel and Ceramic-Metal Systems.Current edition approved April 1, 2011. Published April 2011. Originallyapproved in 1977. Last previous edition approved in 2006 as C715 90 (2006).DOI: 10.1520/C0715-90R11E01.2For referenced ASTM standards, visit the ASTM website, www.astm.
13、org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
14、4.3 Aspirator, consisting of a calibrated 500-mL flask,equipped with a twohole stopper, an aspirator bulb, and asuction tube formed from 0.079-in. (2-mm) inside diametercapillary glass tubing.5. Reagents and Materials5.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,
15、it is intended that all reagents shallconform to the specifications of the Committee of AnalyticalReagents of the American Chemical Society.4Other gradesmay be used, provided it is first ascertained that the reagent isof sufficiently high purity to permit its use without lesseningthe accuracy of the
16、 determination.5.2 Purity of WaterUse distilled or deionized water.5.3 Ammonium Hydroxide (sp gr 0.90)Concentrated am-monium hydroxide (NH4OH).5.4 Ammonium Persulfate(NH4)2S2O8.5.5 DimethylglyoximePrepare a 1 % solution of dimeth-ylglyoxime in methyl alcohol or a 2.62 % solution of sodiumdimethylgly
17、oximate in water (store in a polyethylene bottle).5.6 Hydrochloric Acid (1+5)Dilute 1 vol of concentratedhydrochloric acid (HCl, sp gr 1.19) with 5 vol of water.5.7 Nickel Sulfate, Standard Solution Dissolve 0.448 g ofnickel sulfate (NiSO46H2O) in water. When the material iscompletely dissolved, cau
18、tiously add 10 mL of concentratedH2SO4and transfer the solution to the 1000-mL flask. Whencool, make up to the mark with water. One millilitre of thisstandard solution is equivalent to 0.0001 g of nickel permillilitre.5.8 Nitric Acid (1+1)Dilute 1 vol of concentrated nitricacid (HNO3, sp gr 1.42) wi
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