ASTM B() Standard Specification for Autocatalytic (Electroless) Nickel-Phosphorus Coatings on Metal Scope This . This ASTM B standard specification covers the requirements for electroless nickel-phosphorous coatings on metal. For more details call us. The procedure in our factory is carried out according to: AMS-C, or ASTM B The thickness of the coating and the treatments is displayed in the tables.
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The tensile strength shall be supplied by the purchaser. Already Subscribed to this document. The amount of material removed varies from nothing to 0. Deposits higher than 7.
This standard does not purport to address all of the safety concerns, if any, associated with its use. An example is leaded steel which may exhibit liquid or solid embrittlement after heat treatment.
NOTE b733-04 type instruments give erratic measurements due to variations in conductivity of the coatings with changes in phosphorus content.
The Electroless nickel processes in our plant are medium phosphorus electroless nickel and high phosphorus electroless nickel, where the main characters of this processes are:. Care should be taken to control the humidity between tests. Further, hydrogen embrittlement relief baking for at least 3 hours is required after plating on steels that axtm been heat-treated to a hardness above Rockwell C Your comments are invited either for revision of this standard or for additional standards and should b33-04 addressed to ASTM International Headquarters.
The chemical and physical properties of the deposit vary primarily with its phosphorus content and subsequent heat treatment. The surface of the coating shall be cleaned prior to testing see Note Thermal treatment for hardness enlargement. These solutions are heated and generally remove the deposit at a slower rate than nitric acid. As the deposit nears complete removal, it is common for a slight etch of the substrate to occur.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions. Please keep in mind that the thicknesses called out in the various specifications represent “thickness per side. The instrument shall be calibrated with deposits plated in the same solution under the same conditions on magnetic steel.
Add to Alert PDF. Then remove the part, air dry, and examine for rust spots, which indicate pores. It is asstm by industrial atmosphere exposure on steel substrates in dry or oiled environments. ASTM International takes asgm position respecting the validity of any patent rights asserted in connection with g733-04 item mentioned in this standard. Improvements in wear resistance, corrosion resistance and hardness are achieved. Electroless Nickel Please note that price shown is for minimum thickness.
Created with Webvanta CMS. NOTE 1—Due to the precision of some phosphorus analysis methods a deviation of 0. Make three closely spaced indentations and examine under magni?
Electroless Nickel Plating
For example, coating with a test result for phosphorus of 9. When this occurs, the steel or copper plated article is removed, rinsed, electrocleaned, rinsed, and returned to the stripper. Applications include requirements for diffusion barrier, undercoat, electrical conductivity and wear and corrosion protection in specialized environments.
NOTE 2—The performance of the autocatalytic nickel coating depends to a large extent on the surface? Make sure that the surfaces measured are smooth, clean, and dry.
They are used on beryllium and titanium parts for low stress properties. The thickness of the coating and the treatments is displayed in the tables below: As the voice of the U. ASTM B – standard This is always a good practice when dealing with high value copper alloy articles. The coefficient of friction and stress of deposit are also reduced in comparison to electro-plated bright nickel. The chemical and physical properties of the deposit vary primarily with its phosphorus content and subsequent heat treatment.
For higher thicknesses, please ask for quote. NOTE 14—To protect the edges, electroplate the specimens with a minimum of 5? Do not use gas containing hydrogen with high-strength steel parts. The producer shall not be responsible for coatings defects resulting from surface conditions of the metal, if these conditions have been brought to the attention of the purchaser.
The tests for these quali? The appearance of brown spots after 2 min indicate pores. Consideration of the risk of stripping the deposit should always be considered when selecting this coating.
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. The electroless nickel coating is not poisonous and authorized by the American Health Organization as the best coating for cutlery.
These differences also effect non-destructive thickness testing by X-Ray and magnetic means. Your Alert Profile lists the documents that will be monitored. Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. Standards Subsctiption may be the perfect solution.
If the document is revised or amended, you will be notified by email. This standard does not purport to address all of the safety concerns, if any, associated with its use. Also, discoloration due to heat treatment shall not be cause for b73304 unless special heat treatment atmosphere is speci?