Buy ASTM B SPECIFICATION FOR ELECTRODEPOSITED COATINGS OF ZINC ON IRON AND STEEL from SAI Global. ASTM B Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel CONTAINED IN VOL. , Provides requirements for. ASTM B Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel. This specification covers requirements for electrodeposited.
|Published (Last):||22 December 2008|
|PDF File Size:||6.86 Mb|
|ePub File Size:||13.57 Mb|
|Price:||Free* [*Free Regsitration Required]|
Electrical charasteristics As much as the last layer of the passivation is thin the electrical resistivity is low. If these heat treatments are not required, the purchaser shall specify in the ordering information their exception 5.
The procedure is known as sampling inspection. NOTE 5—Thickness methods that rely on the purity of the zinc deposit may not be sufficiently accurate when evaluating coatings produced from non-cyanide b63 solutions. When Test Methods BBor B are used, remove the supplementary treatment prior to testing. Individual reprints single or multiple copies of this standard may be obtained by contacting B363 at the above address or at phonefaxor service astm.
If heavier coatings are required, allowance for the deposit buildup must be made during the manufacture of the threaded articles. This standard does not purport to address all of the safety concerns, if any, associated with its use. Corrosion Resistance Requirements Types.
While the conditions of exposure and uses of atsm metal are so varied that it is not de? The Zinc coating provides a smooth look as well as good anti-corrosive protection. The black layer has also additional target —prevention of light reflection from the part and is used for optical parts.
NOTE 4—The dimensional tolerance of most threaded articles, such as nuts, bolts, screws, and similar fasteners with complementary threads, normally does not permit the application of a coating thickness much greater than 8. In this event, the basis metal shall be subjected to such polishing or buffing operations as are necessary to yield deposits with the desired? If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Additional types have been added to permit non-chromate passivate treatments to be used in replacement of hexavalent chromium. For these reasons a? Need more than one copy? The sampling plan used for the inspection of the quality coated article shall be agreed upon between the purchaser and producer. Available colors are iridescent and black Colorless chromate passivation gives corrosion resistance ability of 12 hours according to ASTM B until white spots-intended to parts used in a light corrosive environment —indoor.
We have no amendments or corrections for this standard. Colorful chromate passivation gives corrosion resistance ability of 96 hours according to ASTM B until white spots-intended to parts used in a high corrosive environment —outdoor. Test Method B contains several plans and also gives instructions for calculating plans to meet special needs.
Unless a need can be demonstrated, separately prepared specimens shall not be used in place of production items for nondestructive and visual examinations.
They share, however, the most basic of metal finishing requirements: Olive green and Black passivation is thick and has high electrical resistance. The purchaser may similarly require that a report of the test results be furnished.
Decorative charastreistics The exterior visual determined according to last layer. 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.
The size of the sample and the criteria for compliance are determined by the application of statistics. Zinc coating with colorful chromate passivation. B Where service conditions are valid only for coatings with chromate conversion coating.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Our Zinc coating is carried out according to: It is recommended that the following appropriate recommended practices and guides be used: You may delete a document from your Alert Profile at any time.
The separate specimens may also be cut from scrap castings when ferrous alloy castings are being electroplated. The following data, based on worldwide testing, can be used to compare the behavior of electrodeposited coatings of zinc in various atmospheres.
The electrical resistance of this green layer passivation is very high because it asrm thick in relative to other passivations. Your Alert Profile lists the documents that will be monitored.
ASTM B – Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel
A number in parentheses indicates the year of last reapproval. Iron metals rust relative quickly, even in a non-corrosive environment. It does not cover electrodeposited zinccoated steel wire or sheets see Speci? If the document is revised or amended, you will be notified by email. B — 07 Standard Speci? Packaging and Packing Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Corrosion resistance Colorful chromate passivation gives corrosion resistance ability of 96 hours according to ASTM B until white spots-intended to parts used in a high corrosive environment —outdoor.
The type of passivation is determined according to the required characteristics, and is divided into groups: The chromate, passivate, or supplemental? The values are only relative, since individual studies in various parts of the world have resulted in?
Zinc coating with phosphate passivation.