Image analysis software for measuring layer thickness and porosity on inconel coating samples as per ASTM B ASTM B Test Method for Measurement of Metal and Oxide Coating Thickness by. Microscopical Examination of Cross Section. This test method covers. The results stated above relate only to the specific items tested. Information and statements in this report are derived from material, information.

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As calibration is operator dependent, the eyepiece shall be calibrated by the person making the measurement.

For additional guidance see Methods E 3. This theoretical limit is approached by good quality microscopes. If abrasive particles do become embedded, they may be removed by applying a short, light hand polish with metal polish after grinding and before diamond?

Anodized aluminum Coating thickness measurement and seal quality testing using impedance measurements.

An image-splitting eyepiece is advantageous for thin coatings on rough substrate surfaces. If possible, the magni? Some typical etchants are described in Appendix X2.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Micrograph showing multilayer nickel using in-house etching process.

For nickel and copper on zinc-based alloys. This will determine the suitability of the method for measuring the thickness of thin coatings. For determination of thickness of individual layers of multilayer coatings of nickel on bb487 and copper alloys; distinguishes each layer of nickel by identifying structures.


It is better to overplate zinc with cadmium and vice versa. E 3 Methods asym Preparation of Metallographic Specimens2 3.

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Preparation of Cross Sections 6. For gold, lead, silver, nickel and copper coatings on steel, copper, and copper alloys. Conversion coated aluminum part Electrical resistivity and corrosion testing.

That is, for practical purposes, greater magni? Micrograph cross-section showing nickle and copper thickness. This can be minimized by completing the measurement quickly and by measuring each interval twice, once from left to right and once from right to left. Such a movement during the measurement can cause an erroneous measurement at moderate and high magni?

Initial grinding should employ or grade abrasive to reveal the true specimen pro? Etches aluminum and its alloys.

It is usually minimized by overplating the test specimen before mounting. Swab with a fresh solution. Some typical etchants are given in Appendix X2.

For hard, brittle coatings for example v487 or chromium coatings tightly wrapping the specimen in soft aluminum foil before mounting has proved successful. Dubpernell Microporosity Test on a copper, nickel, chromium plated automobile part. 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.

The apparent boundary may be poorly de? Automobile door handle – copper, multilayer nickel and hard chromium plated. The thickness of the cross section is measured with an optical microscope. Removal of coating material during surface preparation for overplating can cause a low-thickness measurement. NOTE 1—These techniques will be familiar to experienced metallographers but some guidance is given in Section 5 and in Appendix X1 for less experienced operators.


If, before grinding, reference marks are inscribed n487 the side of the mount, any inclination from horizontal is easily measurable. For silver and gold on copper and nickel alloys and steel.

Etches steel, copper, and copper alloys. This is especially applicable to the chemicals cited in Table X2.

Coating Thickness ASTM B | Watson Grinding

To verify the absence b48 smearing, the coating thickness should be measured and the polishing, etching, and thickness measurement repeated. It is not reasonable to specify only one set of techniques, and it is impractical to include all suitable techniques. The latter has a lower precision. Etches zinc, zinc-based alloys and cadmium. If an especially high degree of surface? 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.

Precision and Bias 9. Micrograph showing varying thickness of nickel and copper for electroplated part.

Windowpane Coating thickness measurement and seal quality testing using impedance measurements. For nickel on copper and its alloys. For a microscope there is a theoretical limit of resolution determined by the numerical aperture NA of the objective. Coulometric and microscopic cross section thickness analysis, STEP potential, Microporosity using Dubpernell test, Active sites before and after corrosion.

Etches copper and copper alloys.