Corrosion And Season Cracking Flashcards
1
Q
what are two type of metal defects
A
mechanical (cracking)
chemical (corrosion)
2
Q
what causes season cracking?
A
the presence of ammonia
extreme heat and cold
3
Q
how is season cracking reduced
A
by annealling the brasx to reduce the presence of cracks
4
Q
define corrosion
A
the conversion of a metal to a non metallic state
5
Q
what increases the rate of corrosion
A
ambient air temperature
humidity
impurities in the packaging materials
6
Q
name 5 types of corrosion
A
rust aluminium oxidation mazak contamination cupric azide zinc exudation
7
Q
how do you remove corrosion
A
use of white spirit or light emery grade paper
8
Q
cuprous azide contamination can occur in what
A
copper detonatiors contain lead azide
