ASTM B733-97 PDF

ASTM B Standard Specification for Autocatalytic (Electroless) Nickel- Phosphorus Coatings on Metal. This specification covers requirements for. A S T M BENGL W Ob T A U 4Tb – m AMERICAN origioauy published as B direct responsibility of Subcommittee B Advanced Plating Technologies, a Milwaukee, Wisconsin company, provides electroless nickel plating per MIL-C, ASTM B and AMS as well as.

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Fine cracks in the coating on the tension side of the bend are not an indication of poor adhesion. NOTE 11—The autocatalytic nickel process is dynamic and a daily sampling is recommended. The wear rate shall be specied by the purchaser and agreed to by the producer. Your comments ast invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The instrument shall be calibrated with deposits plated in the same solution under the same conditions astj magnetic steel.

Table 3 describes the heat treatment for maximum hardness. These differences also effect non-destructive thickness testing by X-Ray and magnetic means. This standard is not included in any packages. Properly performed this will ensure coated products of 7b33-97 quality and will reduce the amount of acceptance inspection. The size of the sample and the criteria of compliance are determined by the application of statistics.

The tests for these qualication requirements shall be performed monthly or more frequently. The phosphorus content of the coating must be known to calculate the thickness of the deposit. Proceed to Checkout Continue Shopping. NOTE 13—Eddy-current type instruments give erratic measurements due to variations in conductivity of the coatings with changes in phosphorus content. The use of a statistical regimen to establish the control limits and frequency of analysis may be employed to ensure quality deposits are produced.


This standard does not purport to address all of the safety concerns, if any, associated with its use.

Test Method B contains several plans and also qstm instructions for calculating plans to meet special needs. The conversion of Vickers to Knoop using Tables E is not recommended. The last must yield a numerical value and certain statistical requirements must be met.

For each of the three specimens complete the following steps: The following analysis wavelength lines have been used with minimum interference to determine the alloy.

The instrument must be calibrated with standards having the same composition as the coating. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Last previous edition B — 90 Additional requirements for internal stress, purity, and elongation may be necessary for some applications. Standards Subsctiption may be the perfect b733-997.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the b733-9 of infringement of such rights, are entirely their own responsibility.

Aztm B may be consulted for a list of post treatments that are widely used. Coatings that show imperfections may be rejected. The corrosion resistance of the coating to a specic liquid medium can be determined by means of immersion tests see Practice G 31 or electrochemical test see Practices G 5 and G Avoid rapid astj and cooling of plated parts. Insertion of a sharp probe at the interface of the coating and basis metal to determine the adhesion is suggested.

The inspection lot is then classied as complying or not complying with the requirements based on the results of the inspection sample. The precision and bias requirements will vary for each type of test.

ASTM B-733

We have no amendments or corrections for this standard. NOTE 16—This method is only recommended for deposits in the as-plated condition. The purchaser and producer may agree on the plan s to be used.


The wheels shall be loaded with g with a vacuum on high for the entire test. After rinsing and air drying, examine the part for blue spots, which form at pore sites.

ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing

The hardness of CS wheels can change with time and can effect the reproducibility of results see Test Method D 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. Three standards Test Method BGuide Band Test Method B contain sampling plans that are designed for the sampling inspection of coatings.

They are also used asm the salvage of worn or mismachined parts. For Coatings requiring alloy analysis and corrosion testing weekly sampling should be considered as an option. After 3 min contact, rinse, and apply a solution of alizarin sulfonate prepared by dissolving 1. Matrix effect b733-97 to the distribution of phosphorus in layers of the coating also effect the measurement accuracy and require that calibration standards be made under the same conditions as the production process.

The weight percent of phosphorus shall be in the range designated by type classication see 4. NOTE 2—The performance of the autocatalytic nickel coating depends to a large extent on the surface nish of the article to be plated and how it was pretreated. NOTE 19—Aerated water is prepared by bubbling clean compressed air through distilled water by means of a glass diffusion disk at room temperature for 12 h. These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions.