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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The thickness of the cross section is measured with an optical microscope.
Automobile door handle – copper, multilayer nickel and hard chromium plated. Errors of several percent are not unrealistic unless the scale has been calibrated or has been certi? For silver and gold on copper and nickel alloys and steel. Excessive etching h487 a poorly de?
It atsm usually minimized by overplating the test specimen before mounting. Removal of coating material during surface preparation for overplating can cause a low-thickness measurement. For anodized aluminum alloys. Also suitable for zinc and cadmium on steel. For nickel and copper coatings on aluminum and its alloys.
This is usually achieved by overplating the specimen with a coating at least ? Initial grinding should employ or b847 abrasive to reveal the true specimen pro?
For tin and tin alloy coatings on copper and copper alloys.
ASTM B – Coating Thickness by Cross Section / X-Section
Measurement of the image projected on to a ground-glass plate is usually less satisfactory because of the lack of aetm of the image and poor legibility of the ruler when the projected image is visible. 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.
Aetm coated aluminum part Electrical resistivity and corrosion testing. Your comments will receive careful consideration at a meeting of the g487 technical committee, which you may attend. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
The apparent boundary may be poorly de? This will determine the suitability of the method for measuring the thickness of thin coatings.
Coating Thickness ASTM B | Watson Grinding
Etches steel, copper, and copper alloys. This etchant should be freshly prepared. Micrograph checking proper soldering in circuit board. Dubpernell Microporosity Test on a copper, nickel, chromium plated automobile part. For determination of thickness of asfm layers of multilayer coatings of nickel on steel and copper alloys; distinguishes each layer of nickel by identifying structures.
This theoretical limit is approached by good quality microscopes. For nickel and copper on zinc-based alloys.
Aluminum parts – testing the conductivity and composition Conductivity measurement using eddy current technique and also evaluation of aluminum alloy composition. The distance between two lines of a stage micrometer used for the calibration shall be known to within 0. This is especially applicable to the chemicals cited in Table X2. For a microscope there is a theoretical limit of resolution determined by the numerical aperture NA of the objective.
E 3 Methods of Preparation of Metallographic Specimens2 3. If an especially high degree of surface? 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.
For nickel on copper and its alloys. Etches nickel; excessive attack on steel and copper alloys. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Micrograph cross-section showing nickle and copper thickness.
This standard has been approved for use by agencies qstm the Department of Defense. Current edition approved Feb. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
The measurement will be no more accurate than the calibration of the eyepiece. Micrograph showing varying thickness of nickel and copper for electroplated part.
Micrograph of an automobile plated part with copper axtm nickel. A2lA Official Scope and Certification. Sometimes image sharpness can be improved by using monochromatic light. Measure thickness of aluminum oxide coating. This may be minimized by totally immersing abrasive papers in a lubricant during grinding or by using a copious?
Showing potential difference between semi-bright and bright nickel Showing difference in thickness of bright and semi-bright nickel layers.
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? For practical purposes better resolution cannot be obtained regardless of the quality of the optics or of the total magni? If you asstm that your comments have not received a fair hearing you should make axtm views known to the ASTM Committee on Standards, at the address shown below.