Menu
Search
Filters
Close
Menu

Detection of Surface Contamination During a Scheduled Inspection and Repair Investigation

Detection of Surface Contamination During a Scheduled Inspection and Repair Investigation
Available for download

The Department of National Defence (DND) in Canada has implemented a revised maintenance program for aircraft weapon systems whose goal is to ensure that essential maintenance is accomplished and to assure the continued airworthiness of aeronautical products during in-service operation. The program especially affects legacy aircraft. A case study is being presented where an adhesion failure was detected during a scheduled inspection.

Product Number: 41209-488-SG
Author: Lyn Kearns, Martin Janssen, Jean-Luc Coté
Publication Date: 2009
Industries: Military , Coatings
$0.00
$20.00
$20.00

The Department of National Defence (DND) in Canada has implemented a revised maintenance program for aircraft weapon systems whose goal is to ensure that essential maintenance is accomplished and to assure the continued airworthiness of aeronautical products during in-service operation. The program especially affects legacy aircraft. A case study is being presented where an adhesion failure was detected during a scheduled inspection. After carrying out numerous wet adhesion tests which failed, followed by water break tests on the failed areas, surface contamination prior to organic coating application was suspected. Typical laboratory techniques could not detect any contamination. Use of state-of-the-art Time of Flight – Secondary Ion Mass Spectrometry (ToF-SIMS) with primary ion source, Bi3+, was needed to determine the presence of surface contamination as low as a monolayer. The contamination was positively identified as a cationic surfactant that is commonly used in aircraft cleaners and conversion coating solutions. Further analyses using Scanning Electron Microscopy – Energy Dispersive X-ray Analyses (SEM-EDX), Thermal Gravimetric Analyses (TGA), Differenctial Scanning Calorimetry (DSC) and Dynamic Mechanical Analyses (DMA) were used to ensure the bulk integrity of the failed coatings.

The Department of National Defence (DND) in Canada has implemented a revised maintenance program for aircraft weapon systems whose goal is to ensure that essential maintenance is accomplished and to assure the continued airworthiness of aeronautical products during in-service operation. The program especially affects legacy aircraft. A case study is being presented where an adhesion failure was detected during a scheduled inspection. After carrying out numerous wet adhesion tests which failed, followed by water break tests on the failed areas, surface contamination prior to organic coating application was suspected. Typical laboratory techniques could not detect any contamination. Use of state-of-the-art Time of Flight – Secondary Ion Mass Spectrometry (ToF-SIMS) with primary ion source, Bi3+, was needed to determine the presence of surface contamination as low as a monolayer. The contamination was positively identified as a cationic surfactant that is commonly used in aircraft cleaners and conversion coating solutions. Further analyses using Scanning Electron Microscopy – Energy Dispersive X-ray Analyses (SEM-EDX), Thermal Gravimetric Analyses (TGA), Differenctial Scanning Calorimetry (DSC) and Dynamic Mechanical Analyses (DMA) were used to ensure the bulk integrity of the failed coatings.

Product tags
Also Purchased
Picture for BARE FIELD JOINT FOR SUSBEA PIPELINES A POSSIBLE ALTERNATIVE ?
Available for download

51318-10841-BARE FIELD JOINT FOR SUSBEA PIPELINES A POSSIBLE ALTERNATIVE ?

Product Number: 51318-10841-SG
Author: Gwenaëlle Benoit / Morgan Gouriou / Denis Melot / Jean Vittonato / Nicolas Larché
Publication Date: 2018
$20.00

An experiment to simulate bare field joint configuration under cathodic protection over a long term exposure in seawater on a 3LPE coated pipe section in renewed seawater and half-buried in mud. Results conclude that the bare field joint concept is feasible.
Picture for Surface Soluble salt concentration effect on long life offshore coatings systems performance
Available for download

51318-11132-Surface Soluble salt concentration effect on long life offshore coatings systems performance

Product Number: 51318-11132-SG
Author: The purpose of this work is to study the impact of the quality of steel surface preparation and the level of soluble salt contamination on the performance and durability of protective coating systems.
Publication Date: 2018
$20.00

The purpose of this work is to study the impact of the quality of steel surface preparation and the level of soluble salt contamination on the performance and durability of protective coating systems.
Adhesion Failure Mode Analysis: Cyclic Peel Testing in Synthetic Sea Water
Available for download

Adhesion Failure Mode Analysis: Cyclic Peel Testing in Synthetic Sea Water

Product Number: 41209-482-SG
Author: Ray Holden
Publication Date: 2009
$20.00

In this paper, I will discuss such an example of when the predicted service of the coating determines that a more dynamic method must be utilized. I will discuss testing that was conducted for immersion service where flow of water over the surface was a major consideration. The question of how well the adhesion would hold up in real life service could not be properly answered by the degree of failure in this case. I discovered that the more important consideration was the survivability of the coating if a defect were introduced.
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