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18 Questions

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Corrosion Prevention Methods Quiz

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Questions and Answers

What is the initial stage of crevice corrosion?

Formation of an anodic side

Uniform corrosion (correct)

Accumulation of metal ions in narrow spaces

Formation of metal ions in the stagnant liquid

In crevice corrosion, what accelerates the oxidation process?

Formation of anodic side (correct)

Formation of metal ions in the stagnant liquid

Stagnant water

Accumulation of metal ions in narrow spaces

What are some examples of crevices where crevice corrosion can occur?

Rusted surfaces

Smooth surfaces

Painted surfaces

Flanges, washers, rolled tube ends (correct)

What is a recommendation for preventing crevice corrosion?

Weld instead of rivet Signup and view all the answers

What is pitting in terms of corrosion?

Localized form of corrosion producing cavities or 'holes' Signup and view all the answers

Which of the following is a recommended method to prevent pitting corrosion?

Polish surfaces Signup and view all the answers

Why is pitting considered more dangerous than uniform corrosion damage?

It is harder to detect, predict, and design against. Signup and view all the answers

Which method helps prevent pitting in corrosion?

Using non-absorbing gaskets. Signup and view all the answers

What is a common characteristic of metallic coatings used for corrosion control?

They are always sacrificial coatings. Signup and view all the answers

What is an example of a non-metallic inorganic coating for corrosion protection?

Glass Signup and view all the answers

What is the primary cause of galvanic corrosion?

Connection of dissimilar metals in the presence of an electrolyte Signup and view all the answers

Why is inspection of protective coatings important for corrosion control?

To ensure they can withstand the environment where they are used. Signup and view all the answers

Which method is NOT a common way to prevent uniform corrosion?

Changing the metal alloy composition Signup and view all the answers

What kind of stresses are engineered products subjected to during service that can lead to fatigue?

Dynamic or cyclic stresses Signup and view all the answers

What is the main function of sacrificial anodes in the context of corrosion prevention?

To protect the metal by making it the anode Signup and view all the answers

What is one common method to prevent corrosion mentioned in the text?

Applying sacrificial anodes Signup and view all the answers

Which process involves connecting a metal body electronically to a more reactive metal for protection?

Cathodic protection Signup and view all the answers

In wet corrosion, what tends to happen when dissimilar metals are electrically connected?

Galvanic corrosion occurs Signup and view all the answers