ASTM B842-1999(2005) Standard Specification for Electrodeposited Coatings for Zinc Iron Alloy Deposits《锌铁合金沉积物用电解镀层标准规范》.pdf
《ASTM B842-1999(2005) Standard Specification for Electrodeposited Coatings for Zinc Iron Alloy Deposits《锌铁合金沉积物用电解镀层标准规范》.pdf》由会员分享,可在线阅读,更多相关《ASTM B842-1999(2005) Standard Specification for Electrodeposited Coatings for Zinc Iron Alloy Deposits《锌铁合金沉积物用电解镀层标准规范》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B 842 99 (Reapproved 2005)Standard Specification forElectrodeposited Coatings of Zinc Iron Alloy Deposits1This standard is issued under the fixed designation B 842; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
2、ear 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.1. Scope1.1 This specification covers the requirements for electrode-posited zinc iron alloy coatings on metals.1.2 The va
3、lues stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The following precautionary caveat pertains to the testmethod portion only, Section 8, of t
4、his specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.
5、Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray (Fog) ApparatusB 183 Practice for Preparation of Low-Carbon Steel forElectroplatingB 242 Guide for Preparation of High-Carbon Steel forElectroplatingB 320 Practice for Preparation of Iron Castings for Electro-platingB 322
6、 Guide for Cleaning Metals Prior to ElectroplatingB 374 Terminology Relating to ElectroplatingB 487 Test Method for Measurement of Metal and OxideCoating Thickness by Microscopical Examination of aCross SectionB 499 Test Method for Measurement of Coating Thick-nesses by the Magnetic Method: Nonmagne
7、tic Coatings onMagnetic Basis MetalsB 504 Test Method for Measurement of Thickness of Me-tallic Coatings by the Coulometric MethodB 568 Test Method for Measurement of Coating Thicknessby X-Ray SpectrometryB 571 Practice for Qualitative Adhesion Testing of MetallicCoatingsB 602 Test Method for Attrib
8、ute Sampling of Metallic andInorganic CoatingsB 697 Guide for Selection of Sampling Plans for Inspectionof Electrodeposited Metallic and Inorganic CoatingsB 762 Test Method of Variables Sampling of Metallic andInorganic CoatingsB 849 Specification for Pre-Treatments of Iron or Steel forReducing Risk
9、 of Hydrogen EmbrittlementB 850 Guide for Post-Coating Treatments of Steel for Re-ducing the Risk of Hydrogen EmbrittlementD 3951 Practice for Commercial Packaging3. Terminology3.1 DefinitionsMany terms used in this specification aredefined in Terminology B 374.3.2 Definitions of Terms Specific to T
10、his Standard:3.2.1 significant surface, nthat portion of a coated arti-cles surface where the coating is required to meet all therequirements of the coating specification for that article.3.2.1.1 DiscussionSignificant surfaces are usually thosethat are essential to the serviceability or function of
11、the article,or that can be a source of corrosion products or tarnish filmsthat interfere with the function or desirable appearance of thearticle. Significant surfaces are those surfaces that are identi-fied by the purchaser by, for example, indicating them on anengineering drawing of the product or
12、marking a sample itemof the product.4. Classification4.1 There is one class of zinc iron alloy that is defined asfollows:4.1.1 Class 1Deposits having approximately 99 mass %zinc, balance iron.4.2 There are two coating types that are defined as follows:4.2.1 Type AZinc iron with black chromate conver
13、sioncoating, and1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.08.04 on Soft Metals.Current edition approved Oct. 15, 2005. Published October 2005. Originallyapproved in 1993. Last previous edi
14、tion approved in 1999 as B 842 99.2For referenced ASTM standards, visit the ASTM 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 Internation
15、al, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.2.2 Type BZinc iron with iridescent yellow chromateconversion coating.4.3 There are three coating grades according to thicknessthat are defined as follows:Minimum Thickness, m New ASTM Grade Old ASTM Grade66112
16、 12 218 18 35. Ordering Information5.1 In order to make the application of this specificationcomplete, the purchaser needs to supply the following infor-mation to the seller in the purchase order and drawings:5.1.1 Title, ASTM designation number, and date of issue ofthis specification,5.1.2 Deposit
17、by classification including class (see 4.1),type (see 4.2), and grade (see 4.3),5.1.3 Composition and metallurgical condition of the sub-strate to be coated,5.1.4 Location of significant surfaces (see 3.2),5.1.5 Heat treatment for stress relief, whether it has beenperformed by purchaser or is requir
18、ed (see 6.7),5.1.6 Heat treatment after electroplating, if required (see6.8),5.1.7 Any requirement for submission of sample coatedarticles,5.1.8 Whether or not location of rack marks is to be defined(see 6.3.1),5.1.9 Any requirement for special test specimens (see 8.1),5.1.10 Acceptance inspection p
19、rocedure to be used (seeSection 8),5.1.11 Any requirement for certification (see Section 10),and5.1.12 Any other items needing agreement. For the purposesof this specification, prior agreement on the nature of the finishis required as items plated in bulk may differ slightly inappearance from those
20、that are rack plated.6. Coating Requirements6.1 SubstrateThe metal to be plated shall be free of flawsand defects that will be detrimental to the zinc alloy coating. Itshall be subjected to such cleaning, pickling, and electroplatingprocedures as are necessary to yield deposits with the desiredquali
21、ty.NOTE 1Proper preparatory procedures and thorough cleaning areessential to ensure satisfactory adhesion and corrosion resistance perfor-mance of the coating. Materials used for cleaning should not damage thebasis metal. It is recommended that the following practices for cleaning beused, where appr
22、opriate: Practices B 183 and B 320, and Guides B 242and B 322.6.1.1 The electroplating shall be applied after all basis metalheat treatments have been completed.6.2 Nature of CoatingThe coating shall consist of a zinciron alloy that is approximately 99 mass % zinc and the balanceiron.6.3 Appearance:
23、6.3.1 The coating on all readily visible surfaces shall havean acceptable and characteristic appearance as agreed upon bythe purchaser and seller. The coating shall be uniform insofaras the basis metal will permit. When the article is to be platedon a rack, contact marks may be unavoidable. Location
24、 of suchmarks(s) shall be indicated on the article or its drawing.6.3.2 Defects and variations in appearance that arise fromsurface conditions of the substrate (scratches, pores, roll marks,inclusions, and the like) and that persist in the coating despitethe observance of good metal finishing practi
- 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。
最后一页预览完了!喜欢就下载吧,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:
- ASTMB84219992005STANDARDSPECIFICATIONFORELECTRODEPOSITEDCOATINGSFORZINCIRONALLOYDEPOSITS 铁合金 沉积物 用电 镀层
![提示](http://www.mydoc123.com/images/bang_tan.gif)
链接地址:http://www.mydoc123.com/p-462455.html