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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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.
Originally approved in Another method is to stir d49400 solution with a clean thermometer while the vessel is warmed or cooled by an external source.
Reagents and Materials 6. A means of adjusting for temperature or controlling ast, temperature is essential. It differs from this test method in two major areas: Either a dip-type, pipet-type, or cup-type cell may be used. Elcometer Inc, Michigan Office Relocation.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Unless otherwise indicated, it is intended that all reagents conform to the speci? 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.
A d4490 in parentheses indicates the year of last reapproval. Elcometer E Conductivity Meter An entry level conductivity meter, is ideal for measuring soluble salt concentration and electric conductivity EC of solutions. This 1 This speci? The conversion factor from?
The resulting slurry is allowed to settle and the filtered water can then be tested using a conductivity meter. This contamination of the abrasive can transfer to the steel surfaces being blasted, where it may accelerate corrosion. The reader is warned that it is difficult to make direct comparisons between the results of these two different methods of analysis.
In the ASTM Method the weight of the abrasive is not known; this makes it impossible d44940 assess the ratio between conductivity values determined using this test method procedure and those determined using the ISO procedure.
Elcometer 138 Abrasive Soluble Salt Test Kit – ASTM D4940
However, slags quenched with seawater or other contaminated water, contain high amounts of ionic material as does seashore sand. A typical value for a low level of contamination is 50? This test is useful in establishing the cleanliness of the abrasive at the jobsite. Precision and Bias 7 However, the bias introduced by this factor is in the proper direction. 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 Bresle Salt Kit A range of products to test the level of contaminants on the surface.
Elcometer Abrasive Soluble Salt Test Kit – ASTM D
The amount of supernatant liquid? Last previous edition approved in as D – Calculate the cell constant, K25, as follows: Let stand for 8 min and then stir again for 1 min. Test the samples separately. 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.
Abrasives that showed qualifying extracted salts using the ISO Procedure also showed qualifying extracted salt levels as speci? Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. An independent study by SSPC showed that the relative order of extracted salts using each type of procedure on abrasive materials was identical.
The ASTM method is well suited for use qstm the? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Converting from one unit base to another is not useful as the two methods differ in process. Current edition approved January 10, The ranked order correlation between the two methods was unity.
NOTE 3—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? Method to Method Comparison: 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.
NOTE 1—A typical value of conductivity for a high level of contamination is ? The Society for Protective Coatings, 40 24th St.