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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Abrasives used for blast cleaning surfaces can be contaminated with soluble salts due to the source or the re-use of the blasting media. 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. Thus, it provides an indication of ionic corrosion potential.

However, slags quenched with seawater or other contaminated water, contain high amounts of ionic material as does seashore sand. Method to Method Comparison: Let stand for 8 min and then stir again for 1 min.

It differs x4940 this test method in two major areas: The conversion factor from? Summary of Test Method 3.

Elcometer Abrasive Soluble Salt Test Kit – ASTM D

Elcometer E Conductivity Meter An entry level conductivity meter, is ideal for measuring soluble salt concentration and electric conductivity EC of solutions. Calculate the cell constant, K25, as follows: The Society for Protective Coatings, 40 24th St. Either a dip-type, pipet-type, or cup-type cell may be used.

A number in parentheses indicates the year of last reapproval. 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 direction.

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The resulting slurry is allowed to settle and the filtered water can then be tested using a conductivity meter.

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 Digital Surface Profile Gauge Digital, fast and accurate surface profile inspection on flat and curved sstm. That is, high conductivity due to a lower pH of the contamination would normally indicate greater corrosion potential.

The reader is warned that it is difficult to make direct comparisons between the results of these two different methods of analysis. 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.

Test the samples separately. A means of adjusting for temperature or controlling the temperature is essential.

There was no direct correlation possible between numerical results obtained and reported by the two different methods. The amount of supernatant liquid? The Elcometer Abrasive Soluble Salt Test Kit provides all that is needed to carry out the test in the field or in the laboratory. Last previous edition approved in as D – This 1 This speci? 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.

Elcometer 138 Abrasive Soluble Salt Test Kit – ASTM D4940

This test is useful in establishing the cleanliness of the abrasive at the jobsite. NOTE 1—A typical value of conductivity for a high level of contamination is ? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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Reagents and Materials 6. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Unless otherwise indicated, it is intended that all reagents conform to the speci? The ISO method is well suited to use in a laboratory setting but is poorly suited to use in the? 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? This contamination can be transferred to the blast cleaned surface and result in accelerated corrosion conditions and also cause premature d9440 failure, if this contamination is not removed prior to applying the coating.

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 standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Originally approved in Elcometer E Conductivity Meter, ml Precision and Bias aetm