Cleaning And Corrosion Control Flashcards
Define corrosion
A chemical or electro chemical action in which the metal is changed into a chemical salt
Visual identification of aluminum corrosion
Gray or white powder deposits
Visual identification of copper/copper alloy corrosion
Greenish film (patina)
Visual identification of steel corrosion
Reddish rust
Visual identification of magnesium corrosion
Gray or white powder snow like mounds
What is oxidation known as? When does it occur?
Known as Dry corrosion / occurs when a metal is exposed to a gas containing oxygen
Intergranular corrosion occurs where? Can it be detected from the surface? What method can be used to detect it?
-Inside the metal
-not easily detectable from the surface
- detected with ultrasound testing or X-ray
Smoking Rivets = ? Which is caused by __? Which occurs when__ ?
Concentration cell corrosion - which is caused by fretting - which occurs when 2 surfaces fit tightly together but can move relative to one another
NI-Cad batteries can be neutralized with ___? Lead Acid batteries can be neutralized with __?
- boric acid
-sodium bicarbonate aka baking soda
What do you lubricate Piano Hinges with?
Water Displacement Lubricant
The bilge of seaplanes and amphibians is protected by __?
Potassium Dichromate
ALODINE is also known as __?
Chromic Acid
To protect dissimilar metal contact use, ___?
- 2 coats of ZINC CHROMATE or Epoxy Primer
- a layer of vinyl tape
When cleaning exterior surfaces you must__?
Flush all exterior surfaces with cool clean water to dissolve any salt deposits and remove loose dust
Is TITANIUM corrosion resistant? It is as strong as___ but ____% lighter.
Titanium is inherently corrosion resistant and is as strong as STEEl & 45% lighter
