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.
|Published (Last):||4 June 2016|
|PDF File Size:||2.33 Mb|
|ePub File Size:||19.79 Mb|
|Price:||Free* [*Free Regsitration Required]|
Thicker coatings are used for water containers, threaded steel couplings of oil drilling strings, and seacoast atmospheres. Parts coated with tin can be assembled safely in contact with iron and steel, tin-coated aluminum, yellow chromated zinc, cadmium, and solder coatings. Parts coated with tin can be assembled safely in contact with iron and steel, tin-coated aluminum, yellow chromated zinc, cadmium, and solder coatings.
This specification covers the requirements for electrodeposited tin coatings applied to metallic articles to provide a low contact resistance surface, to protect against corrosion, to facilitate soldering, to provide anti-galling properties, and to be a stop-off coating in the nitriding astn high-strength steels. They shall be adherent and visually free of blisters, pits, peeled areas, cracks, nodules, and unplated areas.
If the sulfur dioxide concentration in the atmosphere is too high, the corrosion product formed is too? The size should be sufficient to accommodate the test specimens with their atsm part at least 75 mm 3 in.
NOTE 2—Careful preparation of metal surfaces is necessary in order to assure good adhesion and quality. For mill products, refer to Speci? If they do not, Test Method B identi? The number of articles shall astmm sufficient to have a total weight of coating of at least 0. However, some of these platings cannot be used in contact with food. Such acceptance or pass-fail criteria, if required, should be part of the product speci? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
The test must yield a numerical value, and certain statistical requirements must be met. Where a contact mark is inevitable, its location shall be subject to agreement between the supplier and the purchaser. Corrosion can be expected at discontinuities in the coating such as pores ashm to galvanic couples formed between the tin and the underlying metal through the discontinuities, especially in asm atmospheres.
Link to Active This link will always route to the current Active version of the standard. The values given in parentheses are for information only.
Also found on baking pans after re? Government Packaging Requirements S4. Three test methods are described in Appendix X3, while a simple dip test is given in Test Method B aatm A number in parentheses indicates the year of last reapproval. Remove the articles, rinse them in clean water, wipe and brush as necessary to remove smut antimony residuesand dry.
MIL-T vs. ASTM B
In normal indoor exposure, tin is protective on iron, steel, nickel, copper, and their alloys. Examination of 43 magni? Poor adhesion will be shown by the appearance of a loose blister that grows as rubbing is continued. Where electroplated tin coatings are subject to long-term storage or use at very low temperatures, it may be advisable, when speci? Diffusion may lead to darkening b554 a thin coating and impairment of its solderability characteristics, particularly after long storage.
This specification does not cover hot-dipped tin or other non-electrodeposited coatings, and mill products.
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. Tin coatings are used to provide a low contactresistance surface, to protect against corrosion see 1.
Add to the sodium thiosulfate solution a volume of 0. These articles the inspection lots are inspected and classi? However, all matte baths except for stannate baths do require the addition of grainre? All surfaces shall be substantially free of grease or oil used in the?
They shall not be stained or discolored. In this specialized application, the occurrence of whisker growth is sufficiently frequent to be an obstacle to the use of tin. The clamp is attached to a load cell and to a transducer, which transmits a signal to a converter that adjusts the signal to a useful mode analog or digital for the recording instrument, computer, or strip-chart recorder. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Last previous edition approved in as B — 97e1. Such surfaces are normally exempt from the thickness requirement.
Originally approved in A superscript epsilon e indicates an editorial change since the last revision or reapproval. The diffusion is slow at room temperature and rapid at elevated temperatures. Moderate exposure conditions, usually indoors, but more severe than Class B. Class A Minimum Thickness 2. Blackening at pores will be evidence of porosity.
ASTM B – standard specification for electrodeposited coatings of tin_百度文库
Your comments are invited either for revision of this astmm or for additional standards and should be addressed to ASTM International Headquarters. Some tin coatings, especially of bright tin, may show? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The thickness is less in interior corners and holes. Some examples are given in Appendix X6. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Calculate the coated area in mm2 to an accuracy of at least 1 part in Practice B may be consulted to determine awtm most appropriate test method. 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.