ASTM B244 PDF

This standard is issued under the fixed designation B; the 1 This test method is under the jurisdiction of ASTM Committee B08 on Metallic. ASTM B Standard Test Method for Measurement of Thickness of Anodic Coatings on Aluminum and of Other Nonconductive Coatings on Nonmagnetic. Find the most up-to-date version of ASTM B at Engineering

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Hull Cells The Kocour Hull Cell is unmatched for its sturdy construction, durability and ease of use. If the roughness of the substrate surface is small, relative to the coating thickness, its effect will probably be negligible.

Your comments are invited either for revision of ast standard or for additional standards and should be addressed to ASTM International Headquarters. They may be coated aluminum plates, or may be foils or shims of?

Proven Structure M1 – Structure

Foils are subject to indentation and should, therefore, be replaced frequently. Therefore, measurements made too near an edge or inside corner will not be valid unless the instrument is speci?

For a given basis metal, awtm higher the measuring frequency, the smaller the critical aetm of the basis metal. Made of 16 and 18 gauge CRS and powdercoated, our rectifiers are the “tanks” of the industry. Featured Products Digital Rectifiers Kocour rectifiers are built to last.

A number in parentheses indicates the b24 of last ashm. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Nonmagnetic Coatings on Magnetic Basis Metals 3. Summary of Test Method 4. An adjustment will affect the outcome of subsequent readings. The effects of properties of the substrate composition, shape, roughness, edge effects, zstm properties and coating composition, mass, surface roughnessas well as ambient and surface temperatures, may require adjustments to be made to the instrument.

Thickness Testing Includes coulometric modules and testers, calibration standards, repair services, and replacement parts. Both the test surface and instrument probe should be kept free of foreign material. A probe is placed directly on the coated surface in a perpendicular position and electronic circuitry is used to convert a reference signal into a coating thickness measurement.

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Chicago, IL Phone: Electroplating Wstm agitators, hull cells, timers, anodes and cathodes, rectifiers, plater’s tape, and other plating accessories View All. Digital Rectifiers Kocour rectifiers are built to last. Kocour Company is ranked first in the metal finishing industry, Kocour enjoys a worldwide reputation for high quality products and services for the Plating Industry. The values given in parentheses are for information only.

ASTM B244 – 09(2014)

If not, either use the back-up method in 7. They are advantageous for adjustments on curved surfaces, and are more readily available than coated standards. Its value should be determined experimentally, if not supplied by the manufacturer of the measuring instrument, since it depends on both the measuring frequency of the probe system and the electrical conductivity of the basis metal. ASTM International takes no position respecting the validity of b2444 patent rights asserted in connection with any item mentioned in this standard.

Buffing and Polishing Includes abrasives, bar compound, buffing wheels, polishing lubricants, specialty compounds, buffing kits View All. Chemical conversion coatings are too thin to be measured by this test method. Resilient foils should be avoided if possible. 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.

This standard has been approved for use by asgm of the Department of Defense. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. When possible, back up the basis metal of the standard or of the test specimen with a sufficient thickness of similar material to make the readings independent of the basis metal thickness. Attention shall be given to the factors listed in Section 8 and to the procedures described in Section 9.

NOTE 1—Although, b2244, this test method can be used for measuring nonconductive coatings on a magnetic basis metal, its use for coatings below 25? Current edition approved April 15, Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Pioneers in the Plating Industry Since A way to determine if the basis metal thickness exceeds the critical thickness is to make measurements before and after backing up the basis metal with similar metal at least 3 mm mils thick.

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Minimum order 15 pcs. Standards suitable for many applications of the test method are commercially available and may be used provided the certi? Buffing and Polishing Includes abrasives, bar compound, buffing wheels, polishing bb244, specialty compounds, buffing kits. To those of you who have not purchased from us, you may be pleasantly surprised at the range of products designed, manufactured, and maintained with quality and performance in mind.

Last previous edition approved in as B — 97 Are you sure you to want to delete this row? Local variations in coating thickness bb244 also require that a number of measurements be made in any given area; this applies particularly to a rough surface see 8.

Originally satm in There is no standard time interval for re-calibration, nor is one absolutely required, but a calibration interval can be established based on experience and the work environment. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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Give appropriate attention to the factors listed in Section 8. General Laboratory General Laboratory.

To those of you who are already Kocour customers, thank you. This eddy-current method is nondestructive and is suitable for measuring the thickness of anodic coatings on aluminum, as well as the thickness of most nonconductive coatings on nonmagnetic basis metals. 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.