ASTM B380-1997(2008)e1 Standard Test Method for Corrosion Testing of Decorative Electrodeposited Coatings by the Corrodkote Procedure《装饰电镀层的涂膏密室耐腐蚀试验的标准试验方法》.pdf
《ASTM B380-1997(2008)e1 Standard Test Method for Corrosion Testing of Decorative Electrodeposited Coatings by the Corrodkote Procedure《装饰电镀层的涂膏密室耐腐蚀试验的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM B380-1997(2008)e1 Standard Test Method for Corrosion Testing of Decorative Electrodeposited Coatings by the Corrodkote Procedure《装饰电镀层的涂膏密室耐腐蚀试验的标准试验方法》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B 380 97 (Reapproved 2008)e1Standard Test Method forCorrosion Testing of Decorative Electrodeposited Coatingsby the Corrodkote Procedure1This standard is issued under the fixed designation B 380; the number immediately following the designation indicates the year oforiginal adoption or,
2、 in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEThe units statement in subsection 1.2 was corrected editorially in April 2008.1. Scop
3、e1.1 This test method covers the Corrodkote2method ofevaluating the corrosion performance of copper/nickel/chromium and nickel/chromium coatings electrodeposited onsteel, zinc alloys, aluminum alloys, plastics and other sub-strates.NOTE 1The following ASTM standards are not requirements. Theyare ref
4、erence for information only: Practice B 537, Specification B 456,Test Method B 602, and Specification B 604.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety conce
5、rns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3B117 Practice for Operating Salt Spray (
6、Fog) ApparatusB 456 Specification for Electrodeposited Coatings of Cop-per Plus Nickel Plus Chromium and Nickel Plus Chro-miumB 537 Practice for Rating of Electroplated Panels Subjectedto Atmospheric ExposureB 602 Test Method for Attribute Sampling of Metallic andInorganic CoatingsB 604 Specificatio
7、n for Decorative Electroplated Coatingsof Copper Plus Nickel Plus Chromium on PlasticsD 1193 Specification for Reagent Water3. Summary of Test Method3.1 The test is conducted by applying a slurry containingcorrosive salts to test specimens, allowing the slurry to dry, andexposing the specimens coate
8、d with the slurry to a high relativehumidity for a specified period of time.4. Significance and Use4.1 Nickel/chromium and copper/nickel/chromium elec-trodeposited coatings are widely used for decorative andprotective applications. The Corrodkote test provides a methodof controlling the quality of e
9、lectroplated articles and issuitable for manufacturing control, as well as research anddevelopment.5. Apparatus5.1 The apparatus shall consist of a humidity chamber,specimen supports, provision for heating the chamber, andprovisions for air circulation in the chamber.5.2 Drops of moisture that might
10、 accumulate on the ceilingor cover of the chamber of specimen supports shall not bepermitted to fall on the specimens being tested.NOTE 2Suitable apparatus may be constructed from salt-spray equip-ment by eliminating fog-spray nozzles, substituting water for the saltsolution in the reservoir, adding
11、 a manifold for bubbling air through thewater in the reservoir, and adding a fan for circulating the air in thechamber with the fan discharge directed across the surface of the water inthe reservoir.5.3 Materials of construction shall not affect the corrosive-ness of the test.6. Procedure6.1 Corrodk
12、ote SlurryPrepare the Corrodkote slurry in aglass beaker by dissolving 0.035 g of reagent grade cupricnitrate (Cu(NO3)23H2O), 0.165 g of ACS reagent grade ferricchloride (FeCl36H2O), and 1.0 g of ACS reagent gradeammonium chloride (NH4Cl) in 50 mL of water conforming to1This test method is under the
13、 jurisdiction ofASTM Committee B08 on Metallicand Inorganic Coatings and is the direct responsibility of Subcommittee B08.10 onTest Methods.The original work in developing the Corrodkote procedure was initiated by theAmerican Electroplaters Society Research Committee, Project No. 15.Current edition
14、approved April 1, 2008. Published April 2008. Originallyapproved in 1961. Last previous edition approved in 2007 as B 380 85 (2007).2Bigge, D. M., “Experience with the Use of the Corrodkote Test,” Proceedings,Am. Electroplaters Soc., Vol. 46, 1959, p. 149.3For referenced ASTM standards, visit the AS
15、TM website, www.astm.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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, Unit
16、ed States.Specification D 1193, Type IV. Stir 30 g of water-washed,ceramic-grade kaolin into the solution. Mix the slurry thor-oughly and allow it to stand for about 2 min so that the kaolinwill become saturated. Mix the slurry thoroughly just beforeusing.6.1.1 An alternative method of preparing the
17、 Corrodkoteslurry is as follows. Weigh out 2.5 g of cupric nitrate(Cu(NO3)23H2O), and dissolve and dilute with distilled waterin a volumetric flask to exactly 500 mL. Weigh out 2.50 g offerric chloride (FeCl36H2O), and dissolve and dilute withdistilled water in a second volumetric flask to exactly 5
18、00 mL.(The ferric chloride solution shall be kept in a dark place andstoppered with a rubber or glass stopper when not in use.) (Theferric chloride solution shall not be more than 2 weeks old,since older solutions become unstable.) Weigh out 50.0 g ofammonium chloride (NH4Cl) and dissolve and dilute
19、 withdistilled water in a volumetric flask to exactly 500 mL. Thenmeasure out exactly 7.0 mL of the cupric nitrate solution, 33.0mL of ferric chloride solution, and 10.0 mL of the ammoniumchloride solution; place these in a beaker to which 30.0 g ofkaolin is now added. Stir with a glass stirring rod
20、.6.2 Test SpecimensThe type and number of test specimensto be used, as well as the criteria for evaluation of the testresults, shall be defined in the specifications covering thematerial or product being tested, or shall be mutually agreedupon by the manufacturer and the purchaser.6.3 Preparation of
21、 Test SpecimensMetallic and metallic-coated specimens may be solvent cleaned before testing, usinga suitable solvent such as alcohol, ethyl ether, acetone orpetroleum ether. Solvents that are corrosive or will depositprotective films shall not be used.6.4 Slurry ApplicationApply the Corrodkote slurr
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMB38019972008E1STANDARDTESTMETHODFORCORROSIONTESTINGOFDECORATIVEELECTRODEPOSITEDCOATINGSBYTHECORRODKOTEPROCEDURE

链接地址:http://www.mydoc123.com/p-461088.html