10 Questions
What is the necessary condition for selective leaching to occur in an alloy?
The two elements must have significant difference in their electrode potentials
Which term is used to describe the process of selective leaching in brass alloys?
Dezincification
How can selective leaching be prevented in alloys?
Avoiding exposure to the specific corrosive medium triggering the leaching
What is the main cause of sensitization in austenitic stainless steels?
Depletion of chromium at grain boundaries
Which method is NOT recommended for the prevention of intergranular corrosion of sensitized stainless steels?
Adding titanium as a stabilizing agent
Exfoliation corrosion in aluminum alloys is most likely to occur due to?
Preferential precipitation at grain boundaries
What is a common industrial alias for pitting corrosion?
Oxygen attack
Which of the following is a characteristic feature of pitting corrosion?
Localized attack with microscopic pits
What process leads to the autocatalytic nature of pitting corrosion?
Chloride ions combine with water to regenerate ions
Which of the following is a common method to prevent selective leaching in metals?
Reducing the ratio of zinc in the alloy
Test your knowledge on selective leaching (dealloying) in alloys, which involves the removal of the more reactive element. Explore the necessary conditions and mechanisms of this process, including examples like the deaeration plug made of alpha-beta brass used for seawater corrosion.
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