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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The amount of supernatant liquid? Axtm contamination of the abrasive can transfer to the steel surfaces being blasted, where it may accelerate corrosion. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

A Micro Mho Per Centimetre 1?

Elcometer E Conductivity Meter An entry level conductivity meter, is ideal for measuring soluble salt concentration and electric conductivity EC of solutions.

In the ASTM Method the weight of the abrasive is not known; this makes it impossible to assess the ratio astk conductivity values determined using this test method procedure and those determined using the ISO procedure.

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 not removed prior to applying the coating. The ISO method is well suited to use in a laboratory setting but is poorly suited to use in the?

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This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? D49440 Inc, Michigan Office Relocation. The Society for Protective Coatings, 40 24th St. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

Elcometer Abrasive Soluble Salt Test Kit – ASTM D

Calculate the cell constant, K25, as follows: The Elcometer Abrasive Soluble Salt Test Kit provides all that astn needed to carry out the test in the field or in the laboratory. The conversion factor from? There was no direct correlation possible between numerical results obtained and reported by the two different methods.

The ASTM method allows a user to measure a loose packed volume of abrasive and mix that abrasive with an equal volume of reagent water.

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.

Converting from one unit base to another is not useful as the two methods differ in process. Elcometer Bresle Salt Kit A range of products to test the level of contaminants on the surface. However, the bias introduced by this factor is in the proper c4940. 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.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. It differs from this test method in two major areas: Precision and Bias 7 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.

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NOTE 1—A typical value of conductivity for a high d49400 of contamination is ? 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.

Reagents and Materials 6. Calibration and Standardization 8. The ranked order correlation between the two methods was unity.

Test the samples separately.

Elcometer 138 Abrasive Soluble Salt Test Kit – ASTM D4940

However, slags quenched with seawater or other contaminated water, contain high amounts of ionic material satm does seashore sand. A volume comparison is more closely related to surface area of the abrasives than is a weight comparison.

Abrasives that showed qualifying extracted salts using the ISO Procedure also showed qualifying extracted salt levels as speci?

The resulting slurry is allowed to settle and the filtered water can then be tested using a conductivity meter. The ASTM method is well suited for use in the? A means of adjusting for temperature or controlling the temperature is essential.