Significance and Use
5.1 The identification of the crystalline structures in water-formed deposits assists in the determination of the deposit sources and mode of deposition. This information may lead to measures for the elimination or reduction of the water-formed deposits.
1.1 These practices provide for X-ray diffraction analysis of powdered crystalline compounds in water-formed deposits. Two are given as follows:
12 to 21
22 to 30
1.2 Both practices yield qualitative identification of crystalline components of water-formed deposits for which X-ray diffraction data are available or can be obtained. Greater difficulty is encountered in identification when the number of crystalline components increases.
1.3 Amorphous phases cannot be identified without special treatment. Oils, greases, and most organic decomposition products are not identifiable.
1.4 The sensitivity for a given component varies with a combination of such factors as density, degree of crystallization, particle size, coincidence of strong lines of components and the kind and arrangement of the atoms of the components. Minimum percentages for identification may therefore range from 1 to 40 %.
1.5 The values stated in SI units are to be regarded as standard. The values listed in parenthesis are for information only.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8 and Note 20.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D887 Practices for Sampling Water-Formed Deposits
D933 Practice for Reporting Results of Examination and Analysis of Water-Formed Deposits
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2331 Practices for Preparation and Preliminary Testing of Water-Formed Deposits
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
crystallographic examination; deposits; metal oxides; scale; x-ray diffraction;
ICS Number Code 13.060.30 (Sewage water)
ASTM International is a member of CrossRef.
Citing ASTM Standards
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