Weld Decay

Question 1

Where do you find the corrosion in weld decay?

Answer 1

HAZ

Question 2

What are the other 2 names for weld decay?

Answer 2

Sensitization

Inter-granular corrosion

Question 3

What material does weld decay affect?

Answer 3

Certain types of systematic stainless steel

Question 4

What 2 specific conditions do you need for weld decay?

Answer 4

HAZ

Corrosive liquid

Question 5

What temperature must the Haz reach to become sensitive to weld decay?

Answer 5

600-850 degrees

Question 6

How do you prevent weld decay?

Answer 6

Use L grade stainless steel
Use alloys such as titanium niobium
Minimise heat input, fewer weld runs

Question 7

How do you get rid of weld decay?

Answer 7

Solution heat treatment 1050-1100 degrees