16 MAY 2015 MATERIALS PERFORMANCE NACE INTERNATIONAL: VOL. 54, NO. 5
MATERIAL MATTERS
Three panels with a zinc-based nanolaminated coating are shown prior to salt fog exposure (left) and after 4,344 h of salt fog exposure (right).
Photos courtesy of Modumetal.
Continued f rom page 15
the zinc is possible because of the coating's
nanolayered architecture. The strength of
the coating also can be enhanced, she adds,
by creating a nanolayer interface that pre-
vents dislocation movement in the alloy.
Nanolaminated components using this
coating process are commercially avail-
able for the oil and gas, aviation, defense,
and highway construction industries.
Coated products include small-scale
tubular joints, valves, connectors, and
fasteners.
To evaluate the performance of the
zinc-based nanolaminated coating in
terms of improved corrosion resistance
and extended service life of offshore as-
sets, laboratory tests have been conducted
on metallic test coupons as well as steel
fasteners—important components on off-
shore assets that corrode in the marine en-
vironment and often need to be replaced,
Lomasney says. The tests included three
types of accelerated corrosion tests and
seven different mechanical tests. Addi-
tionally, field trials are currently in prog-
ress in a tropical offshore environment to
verify the results of the laboratory tests.
The zinc-based nanolaminated coating
consistently demonstrated good results in
the standardized coatings tests and the
offshore field trial. The experimental
methods and results are reported in a
paper presented at CORROSION 2015 in
Dallas, Texas.
1
Source: Modumetal, Inc., modumetal.com.
Contact Christina Lomasney, Modumetal—
e-mail: christina.lomasney@modumetal.com.
Reference
1 M.W. Joosten, J. Vander Laan, S. Lomasney,
C. Lomasney, L. Collinson, J. St. Clair, "Nano-
Laminated, Metallic Coatings for Corrosion
and Abrasion Resistance," CORROSION 2015,
paper no. 5735 (Houston, TX: NACE Interna-
tional, 2015).