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.
|Published (Last):||23 June 2011|
|PDF File Size:||10.75 Mb|
|ePub File Size:||13.92 Mb|
|Price:||Free* [*Free Regsitration Required]|
Coating Thickness ASTM B | Watson Grinding
For anodized aluminum alloys. Precision and Bias 9. Micrograph cross-section showing varying thickness of nickel over copper. 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?
Under good conditions, when using an optical microscope, the method is capable of giving an absolute measuring accuracy of 0. Etches steel, copper, and copper alloys. For nickel and copper on zinc-based alloys. For tin asgm tin alloy coatings on copper and copper alloys. Measure thickness of aluminum oxide coating. This standard has been approved for use by agencies of the Department of Defense. Summary of Test Method 3.
Micrograph of an automobile plated part with copper and nickel. If, before grinding, reference marks are inscribed on the side of the mount, any inclination from horizontal is easily measurable. This etchant should be freshly bb487. For nickel and copper coatings on aluminum and its alloys.
A number in parentheses indicates the year of last reapproval. For determination of thickness of individual layers of multilayer coatings of nickel on steel and copper alloys; distinguishes each layer of nickel by identifying structures. Micrograph showing multilayer nickel using in-house etching process.
Poor quality lenses could preclude accurate measurements. The techniques described in this appendix are intended as guidance for metallographers not experienced in measurements of coating thickness. Dubpernell Microporosity Atsm on a copper, nickel, chromium plated automobile part.
Aluminum parts – testing the conductivity and composition Conductivity measurement using eddy current technique and also evaluation of aluminum alloy composition. Etches nickel; excessive atm on steel and copper alloys.
Sometimes image sharpness can be improved by using monochromatic light. It is usually minimized by overplating the test specimen before mounting.
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. Coulometric and microscopic cross section thickness analysis, STEP potential, Microporosity using Dubpernell test, Active sites before and after corrosion.
Current edition approved Feb. Errors of several percent are not unrealistic unless the scale has been calibrated or has been certi? Initial grinding should employ or grade abrasive to reveal the true specimen pro? This is usually achieved by overplating the specimen ast a coating at least ?
Your comments are invited either for revision wstm this standard or for additional standards and should be addressed to ASTM International Headquarters.
This is especially applicable to the chemicals cited in Table X2.
If possible, the magni? Automobile wheel cap – copper, multilayer nickel and hard chromium plated. Etches zinc, zinc-based alloys and cadmium. 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.
ASTM B – Coating Thickness by Cross Section / X-Section
For practical purposes better resolution cannot be obtained regardless of the quality of the optics or of the total magni? For additional guidance see Methods E 3.
Also suitable for zinc and cadmium on steel. For silver and gold on copper and nickel alloys and steel.
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? Such a movement during the measurement can cause an erroneous measurement at b847 and high magni?
The thickness of the cross section is measured with an optical microscope.