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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Try using an acid zinc chloride bath and see if the casting covers.
B Where service conditions are valid only for coatings with chromate conversion coating. Mark Hollenbeck alloys – Muskegon, Michigan A.
The test must yield a numeric value and ccrtain statistical requirements must be met. This applies to all metals. Raked park shall not crack or fail by fracture when tested in accord;mce with For example, a cold-rolled steel Sorry, but if you need one particular look, you must go through the ugly process of maintaining sample boards with acceptable vs. Answer is based upon pre versions of B, Does plating make that big a difference knowing that it’s going to be painted also? Olive Drab chromate is hrs.
Don Penzenik – Elkhart, Indiana. It still will have Hex Chrome. Ilie ucatlnent required for conversion to l j p e IV shall be in accordance with Guide 1 This standard is not included in any packages.
Any information would be well received. Did you ever get the answers you were looking for? Materials and Manufacture 6. A superscript epsilon jr indicates an editorial change since the last revision or reapproval. SC 4 very severe.
So if I’m interpreting this correct, there is both a color difference and a salt spray difference. The sampling plan used for the inspection of the qualily coated article shall be agreed upon betweet1 the purchaser and producer.
Your Alert Profile lists the documents that will be monitored. The answer is Yes. Our plater would like to go to a clear zinc, but our customer is under the assumption that the clear will not do as good a job with corrosion resistance and salt b63311 life. Thank you for your hard work which the aztm world continues to benefit from. Kaushik, The “Types” define supplementary finishes to be done after the plating. Supplementary treatments shall be in accordance with Recommended Practice B Please forgive any resultant repetition or failures of chronological order.
To secure uniformity of results, age Qpes of be cut from scrap castings when Semus alloy castings are being electroplated. II says “colored chromate coatings” meeting 96 hours of salt spray, and III says “colorless chromate conversion coatings” meeting 12 hours of salt spray. Is there any colour difference OR is there any Salt spray difference?
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor serviceBastm. H1 ; are used, rernove the supplementary treatment prior to testing.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. I am not getting the difference between this. 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.
Put the chromate on light.
ASTM B-633 Type II vs. III zinc plating
You can get the same finish only for xstm and black hex chrome with tri substitutes, but not for yellow or olive as of yet. When Asttm Metllods 1 Trivalent chromates give paler and lighter finishes; some use metals, some use permanganates, some use dyes, in order to replicate the Hex finish. Our plater said that he would be willing to go thicker on the clear.
The part is currently being produced in China and my local platers are suggesting a dye to get a blue color. A nunlher in parentheses indicates the ycar uf liut reapproval. They share, however, the most basic of metal finishing requirements: To minimize your searching efforts and to offer multiple viewpoints, we’ve combined some threads into the dialog you’re viewing.
Test Method 13 contains several plans and also gives instructions for calculating plans lo meet special needs. It does not cover clectrodepositecl zinccoattxl skel wire or sheets sce Specificalivn A lA 5OlM for sheets.
IMC | Zinc Plating
Regards, Ted Mooney, P. August 31, A. What process variation would produce these different results? Need more than one copy? If the purchaser does not their specify an exception lo heat ueatment, tlien the plater sliall use ‘l’ahle I in I j S49 to determine the appropriate heat treatment for the steel asgm on its tensile strength.