After a recent presentation at the Gloster Strut where the aircraft on display
had all its steel parts electro-phoretic coated, I made enquiries at the firm
the builder had used about anti-corrosion treatment on my tailwheel spring arm.
The guy I talked to advised that the EP coating is a bit like an epoxy paint,
and could start to go chalky after a few years. But as Id be liable for the
minimum charge anyway, he suggested I have instead a much more effective
treatment
which is a type of zinc plating and results in a greenish finish that can
be sprayed over for cosmetic appearance. However, that process involves an acid
bath and could lead to hydrogen embrittlement if the arm is high-tensile steel.
He said it should be OK if the steel was not high-tensile - above about 60
ton or 1040 Newtons.
Does anyone know the specification of the steel used for the tailwheel arm?
Or - has anyone a better suggestion for corrosion protection?
in friendship
Rowland
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