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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Electroplating Includes agitators, hull cells, timers, anodes and cathodes, rectifiers, plater’s tape, and other plating accessories View All. Precision and Bias This standard has been approved for use by agencies of the Department of Defense.

If there is no difference between the readings, the critical thickness is exceeded. 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. Chemical conversion coatings are too thin to be measured by this test method.

Standards suitable for many applications of the test method are commercially available and may be used provided the certi? Hull Cells The Kocour Hull Cell is unmatched for its sturdy construction, durability and ease of use.

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Thickness Testing Includes coulometric modules and testers, calibration asm, repair services, and replacement parts. Buffing and Polishing Includes abrasives, bar compound, buffing wheels, polishing lubricants, specialty compounds, buffing kits. Foils are subject to indentation and should, therefore, be replaced frequently.

Thickness Testing Includes coulometric modules and testers, calibration standards, repair services, and replacement parts View All. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. A one-year calibration interval is a typical frequency suggested by many instrument manufacturers.

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If you feel that your comments have not received n244 fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. If the roughness of the substrate surface is small, relative to the coating thickness, its effect will probably be negligible.

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Give appropriate attention to the factors listed in Section 8. Because of this, and despite the use of special probes or? The characteristics of this secondary? Calibration and Standardization 7.

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. Originally approved in Factors Affecting the Measuring Accuracy 8. Buffing and Polishing Includes abrasives, bar compound, buffing wheels, polishing lubricants, specialty compounds, buffing kits View All. Last previous edition approved in as B — 97 Digital Asm Kocour rectifiers are built to last.

Made of 16 and 18 gauge CRS and powdercoated, our rectifiers are the “tanks” of the industry.

The values given in parentheses are for information only. A number in parentheses indicates the year of last reapproval. Kocour Company appreciates the opportunity to introduce you to our company. They are advantageous for adjustments on curved surfaces, and are more readily available than coated standards. Allow weeks delivery. 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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This standard is subject to revision at any time by the responsible technical committee and must v244 reviewed every?

Proven Structure M1 – Structure

Local variations in coating thickness may also require that a number of measurements be made in any given area; this applies particularly to a rough surface see 8. 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.

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. 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.

Are you sure you to b24 to delete this row? The eddy sstm in turn create a secondary magnetic? Attention shall be b24 to the factors listed in Section 8 and to the procedures described in Section 9. Summary of Test Method 4. They may be coated aluminum plates, or may be foils or shims of?