Parts are rack or barrel plated to ASTM B standard thicknesses from ” to “, depending on the base metal and application. Pure % tin is. Designation: B – 97 (Reapproved )e1 Standard Speci?cation for Electrodeposited Coatings of Tin1 This standard is issued under the. ASTM B Standard Specification for Electrodeposited Coatings of Tin.
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Dry and weigh with an accuracy of at least 1 part in The coating should adhere to the basis metal when subjected to the agreed test;?
Also see Note 5. The mandrel shall have a diameter equal to the thickness of the sample. If special test specimens are used 7.
The amount of porosity in the coating that may be tolerable depends on the severity of the environment that the article is likely to asym during service or storage.
See Supplementary Requirements S1 and S2 for details. Historical Version s – view previous versions of standard.
Maintain pressure sufficient to burnish the? Thicker coatings are used for water containers, threaded steel couplings of oil drilling strings, and seacoast atmospheres.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Three test methods are described in Appendix Astn, while a simple dip test is given in Test Method B A glass plate makes an adequate joint on the lubricated ground edges of a glass tank.
Guide B provides a large number of plans and also provides guidance in the selection of a plan. Some examples are given in Appendix X6.
ASTM B – 13 Standard Specification for Electrodeposited Coatings of Tin
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The values given in parentheses are for information only. If the quality of the deposit is also poor, the blister may crack, and the plating will peel away from the basis metal.
Examples are electrical hardware such as cases for relays and coils, transformer cans, screened cages, chassis, frames, and?
Tin coatings are used to provide a low contact-resistance surface, to protect against corrosion see 1. Such surfaces are normally exempt from the thickness requirement.
MIL-T-10727 vs. ASTM B545
This is in contrast to strikes or? A superscript epsilon e indicates an editorial change since the last revision or reapproval. Blackening at pores will be evidence of porosity. The shape of the part is also a factor;? These articles the inspection lots are inspected and classi? There needs to be sufficient free tin below the oxide layer in order for this to occur, because the intermetallic compounds formed from tin and the basis metal will not react in this way 7.
After removing the specimens from the corrosive atmosphere, allow them to dry without wiping or cleaning in any way, and then examine them using the options outlined in Guide BSections 6 and 7. Government Packaging Requirements S4. A number in parentheses indicates the year of last reapproval. A suitable burnishing implement is a copper or steel disk used edgewise and broadside.
Add to the sodium thiosulfate solution a volume of 0. Users of this standard are expressly advised that 5b45 of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Suspend the test specimens above this solution on nonmetallic supports, with the surfaces of the specimens not less than 25 mm 1 in. The mechanical forces of the molten solder and tin? Similar to Class A, but for shorter-term contact applications and short shelf-life requirements, subject to purchaser approval. Test Method B contains several plans and also provides instructions for calculating plans to meet special needs. Where a contact mark is inevitable, its location shall be subject to agreement between the supplier and the purchaser.
NOTE 2—Careful preparation of metal surfaces is necessary in order to assure good adhesion and quality. Coatings shall be grouped into six service classes, which is based on the minimum thickness and severity of service required for the coating, and three surface appearance types, which is based on the type electroplating process employed.
Such acceptance or pass-fail criteria, if required, should be part of the product speci? The buyer and seller may agree on the plan or plans to be used.