ASA Cleaning and corrosion

What can be used to repair the anodized surface of an aluminum alloy part?

A chemical conversion coating, such as Alodine.

How is the inside of a structural steel tubing protected from corrosion?

The tubing is filled with hot linseed oil and then drained.

What is used as a protective finish for the inside of steel tubing?

Hot linseed oil.

What is used to neutralize the electrolyte from a lead-acid battery that has been spilled on an aircraft structure?

A solution of bicarbonate of soda (baking soda) and water.

What is used to neutralize the electrolyte from a nickel-cadmium battery that has been spilled on an aircraft structure?

A solution of boric acid and water, or vinegar.

What solvent is recommended for removing grease from aircraft fabric prior to doping it?

MEK (Methyl Ethyl Ketone) or lacquer thinner.

What is done to cotton and linen fabric to protect it from mildew?

The first coat of dope used on the fabric has a mildewcide mixed in it.

Why should wooden wing spars be finished with a transparent varnish?

The transparent finish allows any decay or rot that develops in the wood to be detected.

what is the proper way to clean Plastics?

flush the plastic with clean water remove dirt by hand Plastics are easily scratched and usage of rags is not reccomended

What are the three types of primers that may be used when painting an aircraft?

Zinc chromate primer, wash primer, and epoxy primer.

What type of thinner is used with zinc chromate primer?

Toluol or Toluene.