Hartzell HC-E4 3 Series Owner's Manual page 47

Term
Corrosion Product
(Aluminum)
Corrosion Product
(Steel)
Crack
Debond
Defect
Delamination
Dent
Propeller Owner's Manual
A white or dull gray powdery material that
has an increased volume appearance
(compared to non-corroded aluminum).
Corrosion product is not to be confused with
damage left in the base aluminum such as
pits, worm holes, and etched surface finish.
When iron or an iron alloy such as steel
corrodes, a corrosion product known as
rust is formed. Rust is an iron oxide which
is reddish in appearance and occupies
approximately six times the volume of
the original material. Rust is flakey and
crumbly and has no structural integrity. Rust
is permeable to air and water, therefore
the interior metallic iron (steel) beneath a
rust layer continues to corrode. Corrosion
product is not to be confused with damage
left in the base steel such as pits and etched
surface finish.
Irregularly shaped separation within a
material, sometimes visible as a narrow
opening at the surface
Separation of two materials that were
originally bonded together in a separate
operation
An imperfection that affects safety or utility
Internal separation of the layers of
composite material
The permanent deflection of the cross
section that is visible on both sides with no
visible change in cross sectional thickness
INTRODUCTION
147
Definition
61-00-47
Rev. 16 May/20
Page 1-21