ASTM D4940 PDF

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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This contamination can be transferred to the blast cleaned astj and result in accelerated corrosion conditions and also cause premature coating failure, if this contamination is not removed prior to applying the coating. Elcometer Digital Surface Profile Gauge Digital, fast and accurate surface profile inspection on flat and curved surfaces. The ASTM method is well suited for use in the?

That is, high conductivity due to a lower pH ashm the contamination would normally indicate greater corrosion potential. It differs from this test method in two major areas: Precision and Bias 7 Last previous edition approved in as D – 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. This constant should be checked periodically, one method being as follows: Current edition approved January 10, Method to Method Comparison: This 1 This speci?

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

Elcometer 138 Abrasive Soluble Salt Test Kit – ASTM D4940

Elcometer E Conductivity Meter, ml Use successive portions of the sample until a constant value is obtained. An independent study by SSPC showed that the relative order of extracted salts using each type of procedure on abrasive materials was identical.

Another method is to stir the solution with a clean thermometer while the vessel is warmed or cooled by an external source. Test the samples separately. Elcometer E Conductivity Meter An entry level conductivity meter, is ideal for measuring soluble salt concentration and electric conductivity EC of solutions. The resulting slurry is allowed to settle and the filtered water can then be tested using a conductivity meter. When no markings distinguishing between units of production appear, take samples from the different packages in 8.

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A superscript epsilon e indicates an xstm change since the last revision or reapproval. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement aztm such rights, are entirely their own responsibility.

Elcometer Abrasive Soluble Salt Test Kit – ASTM D

A typical value for a low level of contamination is 50? There was no direct correlation aatm between numerical results obtained and reported by the two different methods.

The ISO method is well suited to use in a laboratory setting but is poorly suited to use in the? Converting from one unit base to another is not useful as the two methods differ in process. Summary of Test Method 3. The Elcometer Abrasive Soluble Salt Test Kit provides all that is needed to carry out the test in the d4904 or in the laboratory.

NOTE 3β€”In general the cell constant is not greatly affected by variations in the strength of the KCl solution, but, for greater accuracy, measurements should be made at or near the speci? S4940 stand for 8 min and then stir again for 1 min. Either a dip-type, pipet-type, or cup-type cell may be used.

The conductivity, which is related to the concentration of soluble ionic materials contaminating the abrasive surface, is calculated from the conductance and the cell constant. This test is useful in establishing the cleanliness of the abrasive at the jobsite. A Micro Mho Per Centimetre 1? 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. However, slags quenched with seawater awtm other contaminated water, contain high amounts of ionic material as does seashore sand.

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Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

Originally approved in The amount of supernatant liquid? The reader is warned that it is difficult to make direct comparisons between the results of these two different methods of analysis.

Calibration and Standardization 8. Thus, it provides an indication of ionic corrosion potential.

Elcometer Inc, Michigan Office Relocation. Elcometer Bresle Salt Kit A range of products to test the level of contaminants on the surface. Unless otherwise indicated, it is intended that all reagents conform to the speci?

The Society for Protective Coatings, 40 24th St. A volume comparison is more closely related to surface area of the abrasives than is a weight comparison. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Abrasives that showed qualifying extracted salts using the ISO Procedure also showed qualifying extracted salt levels as speci?

NOTE 1β€”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. Abrasives used for blast cleaning surfaces can be contaminated with soluble salts due to the source or the re-use of the blasting media.

However, the bias introduced by this factor is in the proper direction. The ranked order correlation between the two methods was unity. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.