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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ASTM B – Tin Plating by Keystone Finishing
Three standards, Test Method BGuide Band Test Method Bcontain sampling plans that are designed for the sampling inspection of coatings.
Corrosion can be expected at discontinuities in the coating such as pores aetm to galvanic couples formed between the tin and the underlying metal through the discontinuities, especially in humid atmospheres.
Rejection and Rehearing 9. Addition of the sulfuric acid may be made before the test specimens are placed in position, provided that the cabinet is closed within 5 min of addition of the acid. The purchaser shall specify whether the tested articles are to receive sstm arti?
The surface appearance types are matte tin electrodeposits, bright tin electrodeposits, and flow-brightened electrodeposits. Thicknesses of 30 to ?
The method provided, which depends on the production of sulfur dioxide from the reaction between sodium thiosulfate and sulfuric acid within the test chamber, ensures suitable conditions for the development of immobile corrosion products at discontinuities.
Rejection shall be reported to the seller promptly and in writing. Diffusion may lead to darkening of a thin coating and impairment of its n545 characteristics, particularly after long storage.
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.
Link to Active This link will always route to the current Active version of the standard. However, some of these platings cannot be used in contact with food.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. 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. Poor adhesion will be shown if the coating blisters, cracks, or peels.
MIL-T-10727 vs. ASTM B545
Originally approved in A thicker coating of nickel may be required in some situations for additional retardation. All surfaces shall be substantially free of grease or oil used in the? The values given in parentheses are for information only. The thickness is less in interior corners and holes. A glass plate makes an adequate joint on the lubricated ground edges of a glass tank. In normal indoor exposure, tin is protective on iron, steel, nickel, copper, and their alloys. If the quality of the deposit is also poor, the blister may crack, and the plating will peel away from the basis metal.
ASTM does not give any warranty astj or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Where electroplated tin coatings n545 subject to long-term storage or use at very low temperatures, it may be advisable, when speci? Current edition approved April 1, Corrosion can be expected at discontinuities in the coating such as pores due asstm galvanic couples formed between the tin aatm the underlying metal through the discontinuities, especially in humid atmospheres.
ASTM B – 13 Standard Specification for Electrodeposited Coatings of Tin
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. NOTE 2—Careful preparation of metal surfaces is necessary in order to assure good adhesion and quality.
Maintain pressure sufficient to burnish the? Calculate the coated area in mm2 to an accuracy of at least 1 part in Historical Version s – view previous versions of standard. Nonmagnetic Coatings on Magnetic Basis Metals. Black spots or lines are evidence of mechanical damage or gross defects.