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.

Author: Voodoogor Gardagul
Country: Pakistan
Language: English (Spanish)
Genre: Science
Published (Last): 13 August 2016
Pages: 89
PDF File Size: 18.88 Mb
ePub File Size: 20.98 Mb
ISBN: 990-3-81933-497-5
Downloads: 95719
Price: Free* [*Free Regsitration Required]
Uploader: Zologis

Let stand for 8 min and then stir again for 1 min. Use successive portions of the sample until a constant value is obtained. Originally approved in The ranked order correlation between the two methods was unity. Unless otherwise indicated, it is intended that all reagents conform to the speci?

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. A typical value for a low level of contamination is 50? The Elcometer Abrasive Soluble Salt Test Kit provides all that is needed to carry out the test in the field or in the laboratory. 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 resulting slurry is allowed to settle and the filtered water can then be tested using a conductivity meter. The Society for Protective Coatings, 40 24th St. Abrasives used for blast cleaning surfaces can be contaminated with soluble salts due to the source or the re-use of the blasting media.

This constant should be checked periodically, one method being as follows: Current edition approved January 10, This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

It differs from this test method d494 two major areas: That is, high conductivity due to a lower pH of the contamination would normally indicate greater corrosion potential.

  CACING CAMBUK PDF

Calibration and Standardization 8. Your comments are invited either for revision of this standard or aetm additional standards and should be addressed to ASTM International Headquarters. However, the bias introduced by this factor is in the proper direction. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

Elcometer 138 Abrasive Soluble Salt Test Kit – ASTM D4940

Elcometer E Conductivity Meter An entry level conductivity meter, is ideal for measuring soluble salt concentration and electric conductivity EC of solutions. Elcometer Digital Surface Profile Gauge Digital, fast wstm accurate surface profile inspection on flat and curved surfaces.

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. Test the samples separately. When no markings distinguishing between units of production appear, take samples from the different packages in 8.

Elcometer Abrasive Soluble Salt Test Kit – ASTM D

Thus, it provides an indication of ionic corrosion potential. Method to Method Comparison: 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?

Reagents and Wstm 6. A Micro Aztm Per Centimetre 1? Elcometer Bresle Salt Kit A range of products to test the level of contaminants on the surface.

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.

The conversion factor from? The amount of supernatant liquid? There was no direct correlation possible between numerical results obtained and reported by the two different methods. The ASTM method is well suited for use in the? However, slags quenched with seawater or d494 contaminated water, contain high amounts of ionic material as does seashore sand. Either a dip-type, pipet-type, or cup-type cell may be used. Elcometer Inc, Michigan Office Relocation. NOTE 1β€”A typical value of conductivity for a high level of contamination is ?

  HINARIOS SANTO DAIME PDF

Summary of Test Method 3. 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.

Converting from one unit base to another is not useful as the two methods differ in process. Abrasives that showed qualifying extracted salts using the ISO Procedure also showed qualifying extracted salt levels as speci?

A means of adjusting for temperature or controlling the temperature is essential. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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. The ISO method is well suited to use in a laboratory setting but is poorly suited to use in the?

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.

An independent study by SSPC showed that the relative order of extracted salts d49400 each type of procedure on abrasive materials was aatm.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The reader is warned that it is difficult to make direct comparisons between the results of these two different methods of analysis. Another method is to stir the solution with a clean thermometer while the vessel is warmed or cooled by an external source.

iPhone X