Work continues on our Queen’s Flight Wessex this week. All
contaminated areas have now been stripped and the vast majority of the rivet
work and corrosion treatment has now been completed. As I mentioned before in my
last post, the type of corrosion identified on this aircraft is filiform
corrosion. I have had a number of people ask what this actually means. For the
uninitiated I have found the following...so here it goes...
‘Symptoms: Corrosion occurring
beneath paint in the form of random threadlike filaments. Often causes paint
bulging as blisters.’
‘Causes: Moisture and
corrosive agents that reach the metal through cracks or damage in the paint and
set up active corrosion cells. Particularly severe in high humidity, marine and
industrially polluted environments.’
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