Hartzell HC-E4 3 Series Owner's Manual page 46

Term
Composite Material
Compression
Rolling
Constant Force
Constant Speed
Corrosion
(Aluminum)
Corrosion (Steel)
Propeller Owner's Manual
Kevlar , carbon, or fiberglass fibers bound
®
together with, or encapsulated within an
epoxy resin
A process that provides improved strength
and resistance to fatigue
A force that is always present in some
degree when the propeller is operating
A propeller system that employs a governing
device to maintain a selected engine RPM
The chemical or electrochemical attack
by an acid or alkaline that reacts with the
protective oxide layer and results in damage
of the base aluminum. Part failure can occur
from corrosion due to loss of structural
aluminum converted to corrosion product,
pitting, a rough etched surface finish, and
other strength reduction damage caused by
corrosion.
Typically, an electrochemical process that
requires the simultaneous presence of iron
(component of steel), moisture and oxygen.
The iron is the reducing agent (gives up
electrons) while the oxygen is the oxidizing
agent (gains electrons). Iron or an iron alloy
such as steel is oxidized in the presence
of moisture and oxygen to produce rust.
Corrosion is accelerated in the presence
of salty water or acid rain. Part failure can
occur from corrosion due to loss of structural
steel converted to corrosion product, pitting,
a rough etched surface finish and other
strength reduction damage caused by
corrosion.
INTRODUCTION
147
Definition
61-00-47
Rev. 16 May/20
Page 1-20