SOUTHWEST RESEARCH INSTITUTE

Corrosion Testing and Research

 

Sensors and Corrosion Monitoring
Coating Degradation Sensor (CDS)

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Corrosion—Time of Wetness Sensors

Mobile Sensors for Gas Pipeline

Multielectrode Array Sensor (MAS™)

Coating Degradation Sensor (CDS)


Anodes for Cathodic Protection

Subsea Pipeline Pads











  image of coating degradation sensor element with integrated data acquisition and wireless communication electronics
 

Coating degradation sensor element with integrated data acquisition and wireless communication electronics

To protect engineered structures from corrosion and environmental attack, protective measures are taken with paint, temporary coatings corrosion preventative compounds (CPCs), tape coatings or appliqués, which form an insulating, inert and impervious protective layer on the alloy surface.

 

Degradation of these coatings through the adsorption of water, coating damage, defects, and weathering can lead to reduced protection, corrosion and ultimately loss of structural integrity. Monitoring the condition of the protective coating can provide information to trigger maintenance actions and prevent corrosion of the engineered structure.

 

Key Features of the Coating Degradation Sensor

  • U.S. Patent No. 6,911,828

  • Detection of changes in coating performance such as water uptake and environmental degradation of the coating

  • Sensitivity to coating defects such as thin spots and fisheyes

  • Detection of mechanical damage

  • Sensor can be embedded in the structure to detect changes in coating performance prior to onset of corrosion

  • Field evaluation of protective coatings

Field Deployable Sensor Network

A field deployable sensor network capability has been developed by Southwest Research Institute (SwRI) to actively evaluate the condition of protective coatings used to prevent corrosion and structural damage.

  • Automatic connection to system when sensors are in range of a wireless system

  • Base station reconnects to cell phone network in the event of power interruption

  • Sensors store data when out of range of the network and upload data when network is in range

  • Assets can be used and do not have to remain stationary or in storage

  • Sensor packages are water resistant and designed to withstand impacts

image of coating degradation sensor performance for aluminum alloys   image of coating degradation sensor performance for carbon steel with and without coating defects

Coating degradation sensor performance for aluminum alloys

 

Coating degradation sensor performance for carbon steel with and without coating defects

     
     
image of field deployed reader node   image of deployed coating degradation sensor on water tank trailer

Field deployed reader node

 

Deployed coating degradation sensor on water tank trailer

 
image of system schematic showing sensor nodes that collect data and transmit through reader nodes to a base station where data is uploaded to a web portal

System schematic showing sensor nodes that collect data and transmit through reader nodes to a base station where data is uploaded to a web portal

 

For more information about our coating degradation sensor (CDS) capabilities, or how you can contract with SwRI, please contact James F. Dante, at jdante@swri.org or (210) 522-5458.

 

corrosiontechnology.swri.org

 

Contact Information

James F. Dante

Coating Degradation Sensor (CDS)

(210) 522-5458

jdante@swri.org

corrosiontechnology.swri.org

Related Terminology

corrosion research

pipeline corrosion coatings

corrosion sensors

corrosion life prediction

stainless steel

laser Raman spectroscopy

corrosion monitoring

cathodic protection

microbiologically influenced corrosion

Related Information

Assuring the Integrity of Mechanical Systems


Corrosion Engineering, Science and Technology Journal

| Materials Engineering Department | Mechanical Engineering Division | SwRI Home |

Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 10 technical divisions.

August 07, 2014