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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An independent study by SSPC showed that the relative order of extracted salts using each type of procedure on abrasive materials was identical.

Summary of Test Method 3.

Method to Method Comparison: Elcometer E Conductivity Meter An entry level conductivity x4940, is ideal for measuring soluble salt concentration and electric conductivity EC of solutions. Current edition approved January 10, 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?

Elcometer Abrasive Soluble Salt Test Kit – ASTM D

Abrasives used for blast cleaning surfaces can be contaminated with soluble salts due to the source or the re-use d940 the blasting media. There was no direct correlation possible between numerical results obtained and reported by the two different methods. This test is useful in establishing the cleanliness of the abrasive at the jobsite. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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 typical value for a low level of contamination is 50? Abrasives that showed qualifying extracted salts using the ISO Procedure also showed qualifying extracted salt levels as speci? It is the responsibility of d4490 user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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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. A volume comparison is more closely related to surface area of the abrasives than is a weight comparison.

Elcometer 138 Abrasive Soluble Salt Test Kit – ASTM D4940

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

Calibration and Standardization 8. NOTE 1β€”A typical value of conductivity for a high level of awtm is ?

Test the samples separately. This contamination can be transferred to the blast cleaned surface and result in accelerated corrosion conditions and d940 cause premature coating failure, if this contamination is not removed prior to applying the coating.

The resulting slurry is allowed to settle and the filtered water can then be tested using a conductivity meter. Last previous edition approved in as D – This contamination of the abrasive can transfer to wstm steel surfaces being blasted, where it may accelerate corrosion. Elcometer E Conductivity Meter, ml Originally approved in Elcometer Digital Surface Profile Gauge Digital, fast and accurate surface profile inspection on flat and curved surfaces.

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Converting from one unit base to another is not useful as the two methods differ in process. Thus, it provides an indication of f4940 corrosion potential. 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. This 1 This speci? A superscript epsilon e indicates an editorial change since the last revision or reapproval. However, slags quenched with seawater or other contaminated water, contain high amounts of ionic material as does seashore sand. However, the bias introduced by this factor is in the proper direction. When no markings distinguishing between units of production appear, take samples from the different packages in 8.

It differs from this test method in two major areas: Unless otherwise indicated, it is intended that all reagents conform to the speci? Precision and Bias 7 Reagents and Materials 6. The Elcometer Abrasive Soluble Salt Test Kit provides all that is needed to carry out the test in the field or in the laboratory. Let stand for 8 min and then stir again for 1 min.

Either a dip-type, pipet-type, or cup-type cell may be used. A means of adjusting for temperature or controlling the temperature is essential. Use successive portions of the sample until a constant value is obtained. The ranked order correlation between the two methods was r4940. The ASTM method is well suited for use in the?