Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

51318-10968-Atmospheric Corrosion Measurements to Improve Understanding of Galvanic Corrosion of Aircraft

Picture for Atmospheric Corrosion Measurements to Improve Understanding of Galvanic Corrosion of Aircraft
Available for download

An atmospheric cell measures corrosion kinetics. The limiting oxygen reduction current density is increased over immersion results. A segmented, galvanic sensor that enables quantification of spatial distributions of galvanic current is presented.

Product Number: 51318-10968-SG
Author: Shiladitya Paul
Publication Date: 2018
Industry: Coatings and Linings
$0.00
$20.00
$20.00

Atmospheric corrosion represents an annual multi-billion dollar cost burden for the aerospace and defense sectors. For many aircraft, particularly those operating in marine environments, up to ninety percent of corrosion is due to galvanic interactions at dissimilar metal couples. As new materials are introduced with the acquisition of more advanced aircraft, galvanic corrosion is likely to remain a concern. The ability to model galvanic corrosion accurately holds the promise of being able to both predict the performance of new material combinations to guide material selection and predict corrosion damage for maintenance planning. Such models often utilize data collected under immersion test conditions that are not representative of the thin-film electrolytes that are relevant to atmospheric corrosion and may diminish model accuracy and utility. In this work, an atmospheric cell is presented that allows for measurements of corrosion kinetics using thin-film electrolytes. It is observed that the limiting oxygen reduction current density on various alloys is increased several orders of magnitude over immersion results. A segmented, galvanic sensor is presented that enables the experimental quantification of spatial distributions of galvanic current under thin film conditions that is compared to model predictions for verification of the suitability of immersion and thin-film electrolyte polarization data inputs.

Key words: Atmospheric corrosion, thin-film electrolyte, galvanic corrosion, polarization, multi-electrode sensor

Atmospheric corrosion represents an annual multi-billion dollar cost burden for the aerospace and defense sectors. For many aircraft, particularly those operating in marine environments, up to ninety percent of corrosion is due to galvanic interactions at dissimilar metal couples. As new materials are introduced with the acquisition of more advanced aircraft, galvanic corrosion is likely to remain a concern. The ability to model galvanic corrosion accurately holds the promise of being able to both predict the performance of new material combinations to guide material selection and predict corrosion damage for maintenance planning. Such models often utilize data collected under immersion test conditions that are not representative of the thin-film electrolytes that are relevant to atmospheric corrosion and may diminish model accuracy and utility. In this work, an atmospheric cell is presented that allows for measurements of corrosion kinetics using thin-film electrolytes. It is observed that the limiting oxygen reduction current density on various alloys is increased several orders of magnitude over immersion results. A segmented, galvanic sensor is presented that enables the experimental quantification of spatial distributions of galvanic current under thin film conditions that is compared to model predictions for verification of the suitability of immersion and thin-film electrolyte polarization data inputs.

Key words: Atmospheric corrosion, thin-film electrolyte, galvanic corrosion, polarization, multi-electrode sensor

Product tags
Also Purchased
Picture for Cathodic Corrosion Protection with thermally sprayed zinc for steel in maritime conditions
Available for download

51318-10966-Cathodic Corrosion Protection with thermally sprayed zinc for steel in maritime conditions

Product Number: 51318-10966-SG
Author: Dr.-Ing. Frank Prenger / Stefan Hof
Publication Date: 2018
$20.00

Arguments to use long-time cathodic corrosion protection with thermally sprayed zinc and zinc based alloys in… based on laboratory tests, results of field tests as well as the monitoring of metalized steel structures in different countries.
Picture for Effect of Temperature and Pressure on the Performance of Corrosion Resistant Alloy (CRA) Coatings in
Available for download

51318-10967-Effect of Temperature and Pressure on the Performance of Corrosion Resistant Alloy (CRA) Coatings in

Product Number: 51318-10967-SG
Author: Shiladitya Paul
Publication Date: 2018
$20.00

Thermally sprayed CRA coatings can provide a cost-effective corrosion mitigation method for infrastructure in wet supercritical CO2 at 40°C and 80°C. The scales formed on the steel protected it from further corrosion in 10 MPa and 50 MPa CO2.
Picture for Steel Corrosion Rates in a Marine Environment under Failing Coatings
Available for download

51318-10989-Steel Corrosion Rates in a Marine Environment under Failing Coatings

Product Number: 51318-10989-SG
Author: James A. Ellor, P.E.
Publication Date: 2018
$20.00

How corrosion of steel during the initial stages of coating deterioration can be substantial—in fact corrosion rates can exceed that of boldly exposed steel. Coating selection, design assumptions and maintenance intervals are discussed.

 
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