Corrosion
Tags: AMT, Maintenance
Corrosion - The deterioration of metal by chemical or electrochemical attack.
Corrosion. The destruction of the surface of a metal by the chemical action of the fluid in which it is immersed. This takes the form of rust in steels and pitting in light alloys. Corrosion is caused particularly through the action of sea water.
Corrosion is another form of stress riser that's both hard to find and insidious. Corrosion does more than just act as a stress riser; it actively removes metal, thus reducing the structure's ability to resist the loads it was designed for.
Most aluminum surfaces have a layer of pure aluminum on the surface called alclad that protects the metal from corrosion. It is very smooth and not favorable to paint adhesion.
In other words, rust and corrosion. Some of the classics, like the Luscombe, have closed areas that have been collecting moisture for over 50 years.
Corrosion resistance, especially with newer alloys and modern primers;
Low cost and widespread availability;
Proven durability, and resistance to sun and moisture exposure
Existence of vast amounts of empirical data on its properties ...
Described in NACA-TN-259, of August 1927, as "a new corrosion resistant aluminum product which is markedly superior to the present strong alloys. Its use should result in greatly increased life of a structural part.
Composites also offer resistance to fatigue, corrosion and impact damage.
Composites are different from metals. They are combinations of materials differing in composition or form.
Floats and hulls should be inspected for obvious or apparent defects and damage, such as loose rivets, corrosion, separation of seams, punctures, and general condition of the metal skin.
Severe corrosion in the fuselage structure led to explosive decompression and disintegration at high altitude; all 110 on board were killed.
Aircraft parked near the sea have a increase risk at corrosion, check the tiedown rings during regular maintenance for proper fit and remove any corrosion. When gusty winds are predicted it helps to tiedown the nosewheel too at its tiedown ring.
The fuel can accelerate corrosion on some engine parts. By using an after run oil, the fuel is displaced, and a protective coating lines sensitive engine parts. This is an inexpensive engine insurance, and promotes long engine life.
Above all, however, corrosion of steel must be guarded against. The above points should be clear, as in airplane work you are dealing with a structure which is safe with perfect materials and workmanship.
AFTER RUN OIL
A lubricant designed to displace unburned fuel in the engine after running. The fuel can accelerate corrosion on some engine parts. By using an after ...
AFTN
Aeronautical Fixed Telecommunication Network ...
A number of highly stressed members are of chromemolybdenum steel (4130). Other members are of 1025 Steel.
The fuselage is made corrosion resistant by the application of a coat of zincchromate, followed by a sealer coat of nitrate dope.
Another view of the gear attachment. Note that the cover of the cross tube is just glued on. Sometimes the covers come off, but they should be replaced in this event because otherwise moisture can sit in the cross tube leading to corrosion.
Aeroquip Stainless Braided Hose AQP hose is light and flexible with a stainless steel cover to resist corrosion and abrasion. AQP elastomer inner liner is rated to 1000 psi and operates from - 45 deg. to +300 deg. F.
Ailerons and rudder are not interconnected, and when banking into a turn, the nose will yaw opposite the direction of the turn (adverse yaw) unless positive rudder control is exercised. Control cables are stainless steel for corrosion protection.
a check, every 12-17 months, during which aircraft are opened up extensively, so inspectors can use sophisticated devices to look for wear, corrosion and cracks invisible to the human eye; ...
 See also: Aircraft, Aviation, Power, Flight, Structure
  
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