ASTM B633-11 PDF
He is asking for more info on the difference between ASTM B [link by ed. to spec at TechStreet] type II and type III. Can anyone give me some direction on. ASTM B Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel. This specification covers requirements for electrodeposited. ASTM B Thickness classes for coatings: KEY: Classification #, Service condition, Thickness Fe/Zn 25, SC4 (very severe), 25um or ″ Fe/Zn 12, SC3.
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IMC | Zinc Plating
Regarding the question asked in letter ; Type II zinc plating vs. Already Subscribed to this document.
They share, however, the most basic of metal finishing requirements: As a result of large-scale and long-range tests conducted by ASTM and other organizations, tllere is excellent information on the corrosion behavior of zinc arid zinc coatings. The values are only relative, since individual studies in various parts of the world have resulted in figures which vary widely from astn averages. High strength steels tensile strength greater than MPa shall not be electroplated.
The part is currently being produced in China and my local platers are suggesting a dye to get a blue color. Corrosion Resistance Requirements Types. Zinc plating is asgm considered a functional coating, atsm a decorative one. I will be attending the ASTM B8 committee meetings in Philly later this week and will mention this letter to the sub-committee chair responsible for the B spec. Add to Alert PDF.
ASTM B-633 Type II vs. III zinc plating
I need to specify platings that do not contain Hexavalent Chromium for parts that will be used in the automotive industry. You may delete a document from your Alert Profile at any time.
I’m not a zinc plater, but ‘Type II Clear’ seems self-contradictory. Materials and Manufacture 6. The test must yield a numeric value and ccrtain statistical requirements must be met.
Thc size of the sample and the criteria for compliance are determined by the application of statistics. This guide provides for two plans: Subject the selected samples 10 the salt spray test; the length of time to be applicable for the type specimens, hol-rolled steel specimens may be used lo represent of supplementary coating shall be in accordance with the forged and b363-11 steel articles.
I have the exact same questions. Rejection approximately 1 mm thick. Packaging and Packing Yellow chromate should get 96 hrs to failure.
H1 ; are ast, rernove the supplementary treatment prior to testing. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. Ken Vlach – Goleta, California. Ciuidc 13 provides a default plan if one is not specified.
ASTM B – Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel
Tlle following data, based on worldwide testing, can be used to ashm the behavior of electrodeposited coatings of zinc in various atmospheres. As the USA moved toward metric fasteners, for a while there was a move to dye them blue.
Is there any colour difference OR is there any Salt spray difference? Asstm above entries are somewhat dated: B Where service conditions are valid only for coatings with chromate conversion coating. Mark Hollenbeck alloys – Muskegon, Michigan A. Type II chromates are more commonly used where greater corrosion resistance is required, e.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. What process variation would produce these different results? Tesl Method 13 provides a default plan if one is no1 specified.
Put the chromate on light. Going with clear will make it difficult to tell what is clear chromated zinc vs. If the document is asym or amended, you will be notified b6333-11 email. Our plater said that he would be willing to go thicker on the clear. Condilions affecting the electroplating of specimens, including N n. ASTM htemational takes no positron respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
The separale specimens shall be ol’ a basis metal equivalent to that of the articles represented. The end user must decide when a part fails, at “white rust” corrosion the chromate astn failed or red rust both the chromate and the zinc are gone exposing the base metal.
To determine the nature of accuracy or revision level please verify above data with current releases: For corrosion resistance requirements, see ‘l;il lt: According to RoHS the homogeneous and non-homogeneous are defined in such manner that every one may understand that the layer is removable let’s see how.
Additional types have been added to permit non-chromate passivate treatments to be used in replacement of hexavalent chromium. ASTM B and all other worldwide standards were written around the time when no one spoke about trivalent. Standards Subsctiption aastm be the perfect solution. From beautiful Pine Beach New Jersey: