L. Replace all interior items and restore airplane to serviceable condition.
Volume 1
20-42-00
Page 2
OCT 01/01
CORROSION PREVENTION MANUAL
CORROSION REMOVAL TECHNIQUES
PROCEDURE AFTER ALKALINE SPILLS
1. General
A. Alkaline spills are caustic and can cause corrosive damage to airplane
structure unless neutralized.
B. The primary source of alkaline spillage is in the battery compartments where
alkaline electrolytes may overflow during charging or spill during battery
servicing.
C. Alkali-based corrosion removal compounds and airplane cleaners are used
quite extensively during routine maintenance operations. Without thorough
neutralizing and/or rinsing, a spilled alkaline compound can produce corro-sion damage.
D. Containers of alkaline compounds may be part of a cargo and may be broken
during loading or unloading. Spillage from such sources are usually larger
in scale than battery electrolyte spills. It is therefore recommended that
the neutralization of the alkaline be accomplished as soon as possible.
2. Detection
A. Alkalines are clear and are not color detectable. However, spillage is usu-ally spread by personnel working in the immediate spillage area. Such known
spills should be neutralized as soon as possible.
B. In the cases where spillage has gone undetected and has penetrated the pro-tective finishes, a white powdery deposit (aluminum oxide) would indicate
corrosion on aluminum structure.
C. In other instances, particularly around the top of nickel-cadmium battery
cells, the alkaline electrolyte that has overflowed the vent caps reacts
with the carbon dioxide in the air and produce a white powdery deposit. This
white deposit is not corrosive and otherwise harmless but is an indication
that electrolyte has spilled or otherwise escaped.
3. Personnel Protection
WARNING: ALKALINES ACCIDENTLY SPILLED ON SKIN, CLOTHING OR OTHER MATERIAL SHOULD
BE FLOODED IMMEDIATELY WITH CLEAN WATER. IF EYES ARE INVOLVED, FLOOD WITH
CLEAN WATER OR BORIC ACID SOLUTION AND CONSULT A PHYSICIAN IMMEDIATELY.
A. Adequate protective clothing (rubber or plastic gloves, goggles, face
shields, aprons, boots, head gear, etc.) should be worn when handling or
working in alkaline contaminated areas.
B. Wash hands after using alkaline neutralizing treatment solutions and/or
materials before eating or smoking.
C. Waste materials, solvents, chemical solutions, wiping rags, masking materi-als, etc., shall be collected and safely disposed of. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 防腐手册 CORROSION PREVENTION MANUAL 第二册 一般信息(38)
