ASTM D6906-03(2010)e1
(Test Method)Standard Test Method for Determination of Titanium Treatment Weight on Metal Substrates by X-Ray Fluorescence
Standard Test Method for Determination of Titanium Treatment Weight on Metal Substrates by X-Ray Fluorescence
SIGNIFICANCE AND USE
The procedure described in this test method is designed to provide a method by which the coating weight of titanium treatments on metal substrates may be determined.
This test method is applicable for determination of the total coating weight and the titanium coating weight of a titanium-containing treatment.
SCOPE
1.1 This test method covers the use of X-ray fluorescence (XRF) techniques for determination of the coating weight of titanium treatments on metal substrates. These techniques are applicable for determination of the coating weight as titanium or total coating weight of a titanium containing treatment, or both, on a variety of metal substrates.
1.2 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:D6906–03(Reapproved2010)
Standard Test Method for
Determination of Titanium Treatment Weight on Metal
Substrates by X-Ray Fluorescence
This standard is issued under the fixed designation D6906; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
´ NOTE—Editorial corrections were made in 2.3.3 and 4.1 in June 2010.
1. Scope titanium treatments on metal substrates. The measurements are
based on primary standards of known coating weights and
1.1 This test method covers the use of X-ray fluorescence
instrument calibration that correlates the secondary radiation
(XRF) techniques for determination of the coating weight of
intensity with the coating weight quantitatively.
titanium treatments on metal substrates. These techniques are
2.3.2 The coating weight is determined by measurement of
applicable for determination of the coating weight as titanium
the fluorescent X-rays of the coating. The detection system is
or total coating weight of a titanium containing treatment, or
set to count the number of X-rays in an energy region that is
both, on a variety of metal substrates.
characteristic of X-rays from the element of interest. The
1.2 This standard does not purport to address all of the
element of interest in this practice is titanium.
safety concerns, if any, associated with its use. It is the
2.3.3 If a linear relationship exists, the coating weight and
responsibility of the user of this standard to establish appro-
number of counts of X-rays of a titanium treatment on a
priate safety and health practices and determine the applica-
particular substrate can be expressed by a conversion factor
bility of regulatory limitations prior to use.
that represents the number of counts for a particular coating
2. Summary of Practice weight unit/unit area. This is usually expressed in mg/ft or
mg/m of titanium or total coating weight.
2.1 Excitation—The measurement of titanium treatment
2.3.4 The exact relationship between the measured number
coating weights by XRF methods is based on the combined
of counts and the corresponding coating weight must be
interaction of the titanium coating and the substrate with an
established for each individual combination of substrate and
intense beam of primary radiation. Since each element fluo-
titanium-containingtreatment.Usuallydeterminedbythetreat-
resces at an energy characteristic of the particular element, this
ment supplier, this relationship is established by using primary
interaction results in the generation of X-rays of defined
standardshavingknownamountsofthesametreatmentapplied
energy. The primary radiation may be generated by an X-ray
to the same substrate composition as the specimens to be
tube or derived from a radioisotope.
measured.
2.2 Detection—The secondary beam (fluorescent X-rays of
2.3.5 Some X-ray apparatuses have a data handling system
the elements and scattered radiation) is read by a detector that
whereby a coating weight versus X-ray counts curve may be
can discriminate between the energy levels of fluorescing
established within the system for the direct readout of coating
radiations in the secondary beam. The detection system in-
weight. If such apparatus does not permit the entry of a
cludes the radiation detector with electronics for pulse ampli-
conversion factor as described in 2.3.3, it is calibrated using a
fication and pulse counting.
bare, untreated specimen and a minimum of three specimens
2.3 Basic Principle:
with known coating weights of the treatment and substrate
2.3.1 A relationship exists between the treatment coating
combination of interest. The coating weight to be measured
weight and secondary radiation intensity. This relationship is
mustbewithintherangeoftheseknowncoatingweights.More
usually linear within the desired coating weights of the
than three known specimens must be used if the relationship of
X-ray counts to coating weight is not linear over the range to
This test method is under the jurisdiction of ASTM Committee D01 on Paint
be measured. The treatment supplier should be consulted for
and Related Coatings, Materials, andApplications and is the direct responsibility of
recommendations for establishing the curve in the instrument
Subcommittee D01.53 on Coil Coated Metal.
for the particular treatment and substrate combination of
CurrenteditionapprovedJune1,2010.PublishedJuly2010.Originallyapproved
in 2003. Last previous edition approved in 2003 as D6906 - 03. DOI: 10.1520/
interest.
D6906-03R10E01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6906–03 (2010)
3. Significance and Use 6. Procedure
3.1 The procedure described in this test method is designed
6.1 Operate the instrument in accordance with the manufac-
to provide a method by which the coating weight of titanium
turer’s instructions.
treatments on metal substrates may be determined.
6.2 Set the instrument settings as follows:
3.2 This test method is applicable for determination of the
Dial and arm titanium position
total coating weight and the titanium coating weight of a
Seconds indicator pretreatment supplier
titanium-containing treatment. Multiplier switch pretreatment supplier
Response switch pretreatment supplier
Range pretreatment supplier
4. Apparatus and Materials
Milliamps adjust for calibration of output
4.1 MeasuringInstrument, whichiscapableofdetermining pretreatment supplier
the coating weights of titanium-containing treatments on metal
6.3 All specimens must be seated firmly and securely over
substrates by X-ray fluorescence is required. The treatment
the measuring opening. The distance between the measuring
supplier should be consulted for the suitability of the instru-
apparatus and specimen must be maintained the same as that
mentation to be used
3 during the calibration. The blank and treate
...
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