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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This is especially applicable to the chemicals cited in Table X2.

A number in parentheses indicates the year of last reapproval. For anodized astn alloys. Micrograph showing varying thickness of nickel and copper for electroplated part.

Anodized aluminum Coating thickness measurement and seal quality testing using impedance measurements. This standard has been approved for use by agencies of the Department of Defense.

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Etches nickel; excessive attack on steel and copper alloys. Swab with a fresh solution. As calibration is operator dependent, the eyepiece shall be calibrated by the person making the measurement. For practical purposes better resolution cannot be obtained regardless of the quality of the optics or of the total magni?

Coating Thickness ASTM B | Watson Grinding

Automobile wheel cap – copper, multilayer nickel and hard chromium plated. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Excessive etching produces a poorly de? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.


If, before grinding, reference marks are inscribed on the side of the mount, any inclination from horizontal is easily measurable. Showing potential difference between semi-bright and bright nickel Showing difference in thickness of bright and semi-bright nickel layers.

Etches aluminum and atm alloys. Last previous edition B — Measure thickness of aluminum oxide coating. Electroless nickel plated part – Failure analysis Understand why the electroless nickel failed by studying surface micrographs, nickel thickness distribution and also electrochemical characteristics of nickel. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Originally published as B — The distance between two lines of a stage micrometer used for the calibration shall be known to within 0. Current edition approved Feb. For nickel on copper and its alloys.

If a stage micrometer is not certi?

Summary of Test Method 3. Test sealing quality for anodic coatings on aluminum. For gold, lead, silver, nickel and copper coatings on steel, copper, and copper alloys. This will determine the suitability of the method for measuring the thickness of thin coatings. The measurement will be no more accurate than the calibration of the eyepiece.

For silver and gold on copper and nickel alloys and steel. Sometimes image sharpness can be improved by using monochromatic light. E 3 Methods of Preparation of Metallographic Specimens2 3.


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The thickness of the cross section is measured with an optical microscope. Also suitable for zinc and cadmium on steel. This may be minimized by totally immersing abrasive papers in a lubricant during grinding or by using a copious? Conversion coated aluminum part Electrical resistivity and corrosion testing.

An image-splitting eyepiece is advantageous for thin coatings on rough substrate surfaces. Removal of coating material during surface preparation for overplating can cause a low-thickness measurement. The techniques described in this appendix are intended as guidance for metallographers not experienced in measurements of coating thickness. Some typical etchants are given in Appendix X2. A2lA Official Scope and Certification. Under good conditions, when using an optical microscope, the method is capable of giving an absolute measuring accuracy of 4b87.

A change in tube length may occur when the eyepiece is repositioned within the tube, when the focus of the eyepiece tube is changed, and, for some microscopes, when the? This is usually achieved by overplating the specimen with a coating at least ?

The latter has a lower precision. For additional guidance see Methods E 3. Etches copper and copper alloys.