Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Accelerated Field Exposure using Seawater Spray: A Comparison to Traditional Atmospheric Test Methods

Picture for Accelerated Field Exposure using Seawater Spray: A Comparison to Traditional Atmospheric Test Meth
Available for download

The objective was to compare the effect on corrosion of different field exposure conditions: atmospheric exposure in a medium chloride environment, atmospheric exposure with periodic seawater spray, cyclic alternate immersion, and a typical accelerated atmospheric testing protocol (GM 9540).

Product Number: 51317--9335-SG
ISBN: 9335 2017 CP
Author: Derek Horton
Publication Date: 2017
Industries: Maritime , Science of Corrosion
$0.00
$20.00
$20.00

Often the most severe maritime environmental degradation for ships occurs just above the waterline within the splash zone where periodic wet-dry cycles accelerate corrosion. Similarly increased corrosion also occurs at coastal areas where nearby wave action generates more sea-spray aerosols. These areas are subjected to typical degradation through atmospheric deposition and stressors such as UV light but also have an increased time of wetness (ToW) and higher chloride deposition rate compared to atmospheric exposure alone. It has been seen previously that elevated ToW and chloride loading are correlated to higher corrosion rates of various materials.The objective of this series of testing was to compare the effect of different field exposure conditions on corrosion performance: atmospheric exposure in a medium chloride environment atmospheric exposure with periodic seawater spray cyclic alternate immersion and a typical accelerated atmospheric testing protocol (GM 9540). Test materials included copper alloys silver and carbon steel. Oxide analysis was performed using electrochemical impedance and coulometric reduction. These techniques were used in conjunction with microscopy profilometry and other characterization tools to determine the change in surface state and corrosion rates of the exposed materials as a result of the different field exposures.

Key words: Atmospheric Corrosion, sea spray, alternate immersion, Ag, Cu

 

 

Often the most severe maritime environmental degradation for ships occurs just above the waterline within the splash zone where periodic wet-dry cycles accelerate corrosion. Similarly increased corrosion also occurs at coastal areas where nearby wave action generates more sea-spray aerosols. These areas are subjected to typical degradation through atmospheric deposition and stressors such as UV light but also have an increased time of wetness (ToW) and higher chloride deposition rate compared to atmospheric exposure alone. It has been seen previously that elevated ToW and chloride loading are correlated to higher corrosion rates of various materials.The objective of this series of testing was to compare the effect of different field exposure conditions on corrosion performance: atmospheric exposure in a medium chloride environment atmospheric exposure with periodic seawater spray cyclic alternate immersion and a typical accelerated atmospheric testing protocol (GM 9540). Test materials included copper alloys silver and carbon steel. Oxide analysis was performed using electrochemical impedance and coulometric reduction. These techniques were used in conjunction with microscopy profilometry and other characterization tools to determine the change in surface state and corrosion rates of the exposed materials as a result of the different field exposures.

Key words: Atmospheric Corrosion, sea spray, alternate immersion, Ag, Cu

 

 

Product tags
Also Purchased
Picture for Accelerated Offshore Coating Performance Testing
Available for download

Accelerated Offshore Coating Performance Testing

Product Number: 51317--9134-SG
ISBN: 9134 2017 CP
Author: Benjamin Chang
Publication Date: 2017
$20.00

Offshore is a very corrosive environment with a high corrosion rate. The offshore coating service life is relatively short and extremely expensive to apply maintenance coatings onsite.  A new accelerated coating corrosion test method is proposed.
Picture for Atmospheric Corrosion Resistance of Stainless Steel in Middle East: Result of Field Exposure Program
Available for download

Atmospheric Corrosion Resistance of Stainless Steel in Middle East: Result of Field Exposure Program

Product Number: 51317--8964-SG
ISBN: 8964 2017 CP
Author: Sukanya Mameng
Publication Date: 2017
$20.00

A marine site and a semi-marine site in the UAE and a rural site in Saudi Arabia were selected in this study. The field test results compare the atmospheric corrosion resistance of eight different stainless steel grades
Picture for AA5083 and AA6082 Exposed to Seawater – Effect of Temperature and Potential on Corrosion Behaviour
Available for download

AA5083 and AA6082 Exposed to Seawater – Effect of Temperature and Potential on Corrosion Behaviour

Product Number: 51317--8942-SG
ISBN: 8942 2017 CP
Author: Roy Johnsen
Publication Date: 2017
$20.00

This paper presents and discusses results from testing of AA5083 and AA6082 in natural seawater at 100C. Samples exposed up to 6500 hours under different condition including polarization to -1500 mV vs. Ag/AgCl, - 1050 mV vs. Ag/AgCl and -700 mV Ag/AgCl.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support