Corrosion & Season Cracking

Question 1

What are the 2 main types of metal defects?

Answer 1

Mechanical
Chemical

Question 2

Name 3 types of Corrosion?

Answer 2

Rust
Aluminium Oxidation
Cupric Azide

Question 3

How do you remove Corrosion from cart cases?

Answer 3

Use white spirit or light grade emery paper
If corrosion is severe sentence ammo according to pam

Question 4

Explain Cuprous Azide contamination?

Answer 4

Can occur in copper detonators containing lead azide which when exposed to moisutre liberate small amounts of Hydrazoic acid vapour which attacks the copper.

Question 5

Define corrosion?

Answer 5

Conversion of a metal to a non-metallic state

Question 6

When are stresses most likely to be formed in metal and what can aggravate them?

Answer 6

The stresses may be formed in the metal during manufacture and which may be further aggravated by environmental changes.

Question 7

Define Season Cracking?

Answer 7

Stressed areas of metal cracking due to the affect of ammonia forming cuprammonium during storage in either hot or cold temperatures.