• NACE equips society to protect people, assets and
    the environment from the adverse effects of corrosion.
Embedded Condition Monitoring System for Tank Coatings
Presenting Author:
Full Name: Kevin Farinholt
Parent Company: Luna Innovations, Inc
Location: Phoenix Convention Center
100 North 3rd St.
Presentation Time: 4/16/2018 @ 11:10 AM
Secondary Authors:
  • Name:Michael Desrosiers
  • Name:Mark Kim
  • Name:Ethan Thompson
  • Name:Fritz Friedersdorf
Embedded Condition Monitoring System for Tank Coatings

A combination of material coating and cathodic protection systems are used to inhibit corrosion of steel tanks and enclosures on Navy ships.  The state of these coating systems is often assessed through visual inspection of the confined space by human inspectors that enter tanks while vessels are in depot.  Use of an automated or in-situ inspection method has the potential to reduce operating and maintenance costs by informing maintainers of specific tanks or enclosures that require further inspection or repair through condition based assessments.  One such technology has been developed, using electrochemical sensors and stochastic models to detect the onset of damage and estimate the extent and location within an enclosed volume.  This coating condition monitoring (CCM) system is composed of a network of sensor nodes that measure environmental conditions and electrochemical parameters to evaluate the health of coating and substrate for steel plates and tanks.  Laboratory testing has shown that the technique works for 3 dimensional tanks treated with ultra-high solids protective coatings, and to length scales of at least 5.5 meters.  A prototype of the sensors and embedded electronics has been built and tested in a physical scale model tank, and is currently being scheduled for relevant environment testing on a near full-scale test tank in open seawater.  Performance of the prototype system under laboratory conditions will be presented, along with preliminary results from relevant environment testing on a representative ballast tank model. 

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