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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Unless otherwise indicated, it is intended that all reagents conform to the speci? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? A typical value for a low level of contamination is 50?
Elcometer 138 Abrasive Soluble Salt Test Kit – ASTM D4940
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. The Society for Protective Coatings, 40 24th St. 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.
Last previous edition approved in as D – Thus, it provides an indication of ionic corrosion potential. A number in parentheses indicates the year of last reapproval.
Test the samples separately. Let stand for 8 min and then stir again for 1 min. 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.
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. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 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.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Elcometer Abrasive Soluble Salt Test Kit – ASTM D
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor atsm astm. However, slags quenched with seawater or other contaminated water, contain high amounts of ionic material as does seashore sand. The ISO method is well suited c4940 use in a laboratory setting but is poorly suited to use in the?
NOTE 3—In general the cell constant is not greatly affected by variations in the strength of the KCl solution, but, for greater accuracy, qstm should be made at or near the speci? Use successive portions of the sample until a constant value is obtained.
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.
Elcometer Bresle Salt Kit A range of products to test the level of contaminants on the surface. This test is useful in establishing the cleanliness of the abrasive at the jobsite.
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 s4940 and those determined using the ISO procedure. The ranked order correlation between the two methods was unity.
However, the bias introduced by this factor is in the proper direction. A Micro Mho Per Centimetre 1?
Converting from one unit base to another is not useful as the two methods differ in process. 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 Elcometer Abrasive Soluble Salt Test Kit provides all that is needed to carry out the test in the field or in the laboratory.
The reader is warned that it is difficult to make direct comparisons between the results of these two different methods of analysis. Precision and Bias 7 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. Abrasives used for blast cleaning surfaces can be contaminated with soluble salts due to the source or the re-use of the blasting media.
The amount of supernatant liquid? Calculate the cell constant, K25, as follows: