SERVICE MANUAL & ICA
WIPLINE 3730 & 3900 FLOATS
Page 18
Revision K
P/N 1002551
3.0 CORROSION
Reference the Wipaire Structural Repair Manual (SRM) for allowable corrosion/material loss limits. Corrosion is
a reaction that destroys metal by an electrochemical action that converts metal to oxide. Corrosion is accelerated
when in contact with dissimilar metals such as aluminum and steel, or any material which absorbs moisture like
wood, rubber, or dirt.
The primary means of detection of corrosion is visual. The most obvious sign is a corrosive deposit of white
powder. Other signs are discoloration of the metal surface or bubbles and blisters under the painted surface. Light
corrosion may be removed by light hand sanding or chromic acid. Moderate and severe corrosion (blistering,
flaking, and pitting) may be removed by heavy sanding or grinding, and applying chromic acid. No more than
1/3rd the thickness of skin material should be removed before complete replacement or reinforcement of an area
is necessary.
After removing the corroded area, restore area to original finish (prime and enamel). BOESHIELD T9, Corrosion
X, or ACF-50 may also be applied to stop corrosion. Refer to manufacturer’s instructions for application
instructions.
Maintaining the float inside and outside finishes by washing after saltwater operations will help protect the float
from corrosion. Periodically, all hardware should be covered with a waterproof grease, or paralketone. Under
saltwater conditions, bolts should be removed at least once a year and grease reapplied to the shafts, heads and
nuts.
THE ABOVE TECHNIQUES ARE VITAL
FOR KEEPING CORROSION TO A MINIMUM. SALTWATER
OPERATIONS ARE STRONGLY LINKED TO
CORROSION AND MUST BE ADDRESSED PROACTIVELY.
