ASTM B487 PDF

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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It is usually minimized by overplating the test specimen before mounting. 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.

Under good conditions, when using an optical microscope, the method is capable of giving an absolute measuring accuracy of 0. Current edition approved Feb. The measurement will be no more accurate than the calibration of the eyepiece. Removal of coating material during surface preparation for overplating can cause a low-thickness measurement. Etches steel, copper, and copper alloys. The latter has a b47 precision.

Errors of several percent are not unrealistic unless the scale has been calibrated or has been certi? For nickel and copper on zinc-based alloys. Precision and Bias 9. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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.

For nickel on copper and its alloys. Micrograph checking proper soldering in circuit board. 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.

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Sometimes image sharpness can be improved by using monochromatic light. 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.

Coating Thickness ASTM B | Watson Grinding

Automobile wheel cap – copper, multilayer nickel and hard chromium plated. Swab with a fresh solution. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of awtm of such rights, are entirely their own responsibility. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

This standard has been approved for use by agencies of the Department of Defense. This is usually achieved by overplating the specimen with a coating at least ?

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This may be minimized by totally immersing abrasive papers in a lubricant during grinding or by using a copious? Coulometric and microscopic cross section thickness analysis, STEP potential, Microporosity using Dubpernell test, Active sites before and after corrosion.

Excessive etching produces a poorly de? Such a movement during the measurement can cause an erroneous measurement at moderate and high magni? For anodized aluminum alloys. The thickness of the cross section is measured with an optical microscope.

For additional guidance see Methods E 3. Summary of Test Method 3. The satm between two lines of a stage micrometer used for the calibration shall be known to within 0.

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For tin and tin alloy coatings on copper and copper alloys. Conversion coated aluminum part Electrical resistivity and corrosion testing.

Test sealing quality for anodic coatings on aluminum. Automobile door handle – copper, multilayer nickel and hard chromium plated.

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A superscript epsilon e indicates an editorial change since the last revision or reapproval. This will determine the suitability of the method for ast the thickness of thin coatings. Etches aluminum and its alloys. Preparation of Cross Sections 6.

Also suitable for zinc and cadmium on steel. That is, for practical purposes, greater magni? The apparent boundary may be poorly de? Micrograph showing varying thickness of nickel and copper for electroplated part.

Windowpane Coating thickness measurement and seal quality testing using impedance measurements. Etches zinc, zinc-based alloys and cadmium. Measure thickness of aluminum oxide coating. To verify the absence of smearing, the coating thickness should be measured and the g487, etching, and thickness measurement repeated. Showing potential difference between semi-bright and bright nickel Showing difference in thickness of bright and semi-bright nickel layers.

For a microscope there is a theoretical limit of resolution determined by the numerical aperture NA of the objective. A2lA Official Sstm and Certification. The techniques described in this appendix are intended as guidance for metallographers not experienced in measurements of coating thickness.

If possible, the magni? Poor quality lenses could preclude astk measurements. This is especially applicable to the chemicals cited in Table X2.