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Flashcards in Stainless Steel Corrosion Resistance Deck (5)
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1

What happens if 2 pieces of stainless steel are bolted tightly together and left outdoors in the weather?

Corrosion will develop between the 2 pieces while the outer surface will remain clean. This effect is called "Crevice corrosion" or "anaerobic (without oxygen) corrosion"

2

What happens if 2 pieces of stainless steel are bolted tightly together and left outdoors in the weather?

Corrosion will develop between the 2 pieces while the outer surface will remain clean. This effect is called "Crevice corrosion" or "anaerobic (without oxygen) corrosion"

3

Welding carbon steel to stainless steel

Use a high nickel content filler metal (E309, E312) otherwise the fusion zone of the weld bead could become extremely hard and brite, resulting in cracking and failure during service

4

What treatments help to increase corrosion resistance?

Acid cleaning (pickling) and then passivating which puts a thin layer of chromium oxide on metal that protect it from corrosion

5

What chromium particles can be produced when welding and grinding operations?

Hexavalent chromium also called "chromium six". The threshold limit value (TLV) is set at 5 micrograms or less per cubic metre of air in an 8 hr working day