ASTM D4940 PDF

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ASTM D standard describes the conductivity test used to assess the presence of ASTM D test method consists in combining equivalent volumes of. ASTM D – Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contaminatio. ASTM D Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contamination of Blast Cleaning Abrasives.

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The conversion factor from?

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Unless otherwise indicated, it is intended that all reagents conform to the speci? Elcometer Inc, Michigan Office Relocation. However, the bias introduced by this factor is in the proper direction.

Elcometer E Conductivity Meter, ml Elcometer E Conductivity Meter An entry level conductivity meter, is ideal for measuring soluble salt concentration and electric conductivity EC of solutions. A Micro Mho Per Centimetre 1? The amount of supernatant liquid? This aztm This speci? The ranked order correlation between the two methods was unity.

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. A measured volume of the abrasive is mixed with the same volume of water and agitated to allow any soluble salts to dissolve in the water.

Calculate the cell constant, K25, as follows: When no markings distinguishing between units of production appear, take samples from the different packages in 8. Reagents and Materials 6.

Precision and Bias 7 Another method is to stir the solution with a clean thermometer while the vessel is warmed or cooled by an external source. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? This constant should be checked periodically, one method being as follows: This test is useful in establishing the cleanliness of the abrasive at the jobsite.

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Test the samples separately. A typical value for a low level of contamination is 50? Converting from one unit base to another is not useful as the two methods differ in process. That awtm, high conductivity due to a lower pH of the contamination would normally indicate greater corrosion potential. Let stand for 8 min and then stir again for 1 min.

Elcometer 138 Abrasive Soluble Salt Test Kit – ASTM D4940

Either a dip-type, pipet-type, or cup-type cell may be used. 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. Elcometer Bresle Salt Kit A range of products to test the level of contaminants on the surface. In the ASTM Method the weight of the abrasive is not known; this makes it impossible to assess the ratio between conductivity values determined using this test method procedure and those determined using the ISO procedure.

An independent study by SSPC showed that the relative order of extracted salts using each type of procedure on abrasive materials was identical. It differs from this test method in two major areas: The Elcometer Abrasive Soluble Salt Test Kit provides all that is needed to carry out the test in the field or in the laboratory. Method to Wstm Comparison: Your comments are invited either for revision of this standard or for additional standards and should be d49440 to ASTM International Headquarters.

NOTE 1—A typical value of conductivity for a high level of contamination is ? This contamination of the abrasive can transfer to the steel surfaces being blasted, where it may accelerate corrosion.

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Elcometer Abrasive Soluble Salt Test Kit – ASTM D

Originally approved in A superscript epsilon e indicates an editorial change since the last revision or reapproval. The ISO method is well suited to use in a laboratory setting but is poorly suited to use in the? D49440 used for blast cleaning surfaces can be contaminated with soluble salts due to the source or the re-use of the blasting media.

A means of adjusting for temperature or controlling the temperature is essential. Summary of Test Method 3. However, slags quenched with seawater or other contaminated water, contain high amounts asgm ionic material as does seashore sand. The Society for Protective Coatings, 40 24th St.

A number in parentheses indicates the year of last reapproval. 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. Last previous edition approved in as D – The resulting slurry is allowed to settle and the filtered water can then be tested using a conductivity meter.

Elcometer Digital Surface Profile Gauge Digital, fast and accurate surface profile inspection on flat and curved surfaces. This contamination can be transferred to the blast cleaned surface and result in accelerated corrosion conditions and also cause premature coating failure, if this contamination is satm removed prior to applying the coating.

There was no direct correlation possible between numerical results obtained and f4940 by the two different methods. Thus, it provides an indication of ionic corrosion potential.

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