Inspector.
1.8.3
Metallizing Applicator Qualification
The Applicator Qualification Test shall be performed in the presence of the
Contracting Officer's Representative unless otherwise specified or
directed. Each worker to apply metallized coatings on the job shall be
qualified in accordance with the requirements of this paragraph. Test
plates shall be used to qualify applicators at the start of a job. The
test plates shall be 305 x 305 x 9.5 mm 12 x 12 x 0.375 inch flat steel and
shall have the same chemical composition as the work surfaces to be coated.
The cleaning method and abrasives used to prepare the test plate shall be
the same as that to be used on the work surfaces. The blast profile shall
be measured and recorded in accordance with ASTM D 4417, Method C. The
specified coating thickness shall be applied in not less than two half
lapped passes applied at right angles to each other. The adhesive strength
shall be tested in accordance with ASTM D 4541 using a self-aligning Type
IV adhesion tester. The adhesion strength shall be measured and recorded
at five randomly selected locations. The average adhesion shall not be
less than [6.9 kPa 1000 psi for 85-15 zinc-aluminum alloy] [11 kPa 1600 psi
for aluminum] [5.2 kPa 750 psi for zinc]. No single adhesion measurement
shall have a value of less than 80-percent of the specified minimum average
adhesion. If the test fails it shall be repeated using a new test plate.
If the test fails on the second plate the applicator shall be deemed
unacceptable. The specified surface profile and adhesion tests shall be
conducted and documented by the qualified Coating Inspector.
1.8.4
Coating Inspector Qualifications and Experience
**************************************************************************
NOTE: Specify NACE Basic for most projects, NACE
Certified for large or complex projects. The
specifier may add a requirement for the qualified
coating inspectors to be employed by an independent 3
rd party inspection firm.
**************************************************************************
Documentation of certification shall be submitted for all coating inspectors.
The minimum certification requirement is a [Basic][Certified] Inspector
under the National Association of Corrosion Engineers Coating Inspector
Training and Certification Program. The documentation shall include the
NACE inspector identification numbers, date of qualification, and
expiration date. In addition to certification all coating inspectors shall
as a minimum have performed coating inspection on at least one previous
thermal spray job or have attended an SSPC tutorial on thermal spray
coating application.
1.8.5
Metallized Coating Thickness Gage Qualification
Documentation of certification shall be submitted for all coating thickness
gages. Magnetic flux-type thickness gages as described in ASTM D 1186,
Method B, shall be used to make all metallized coating thickness
measurements. The gage shall have an accuracy of +/- 3% or better.
Thickness gages to be used on the job shall be certified by the gage
manufacturer as meeting these requirements.
1.8.6
Competent Person Qualifications and Experience
The Contractor shall utilize a qualified and competent person as defined in
SECTION 09971A
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