Corrosion Types and Passivation Process Quiz

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What causes concentration differences leading to rapid corrosion in crevice corrosion?

High oxygen levels outside the crevice

Excessive heat in the crevice

Presence of solid particles in the crevice

Solution stagnation in the crevices (correct)

Apart from passive metals, where else can crevice corrosion occur?

In non-metallic materials (correct)

In alloys with high corrosion resistance

Active metals

Only in highly acidic environments

What is recommended to be chosen to prevent crevice corrosion?

Corrosive solutions

Materials that promote sharp corners

Absorptive materials

Non-absorptive materials (correct)

What should be avoided in vessel design to minimize crevice corrosion?

Designing with sharp corners and stagnant areas Signup and view all the answers

What is suggested instead of soldering or welding to prevent crevice corrosion?

Adopting a soldering approach Signup and view all the answers

How can solution deposits causing corrosion be effectively managed?

Apply protective coatings inside the vessels Signup and view all the answers

What is the process that occurs in two ways and includes passivation?

Corrosion Type Signup and view all the answers

Which type of corrosion occurs because of contact between different metals?

Galvanic Corrosion Signup and view all the answers

What is the weight loss of material by this type of corrosion small, but it is dangerous?

Pitting Corrosion Signup and view all the answers

Which metal has the most negative standard electrode potential?

Sodium Signup and view all the answers

Which type of corrosion is not listed in the five corrosion types?

Creep Corrosion Signup and view all the answers

Which type of corrosion is caused by the coupling of two dissimilar alloys in the presence of a corrosive electrolyte?

Galvanic Corrosion Signup and view all the answers

What is the main cause of hydrogen damage?

Presence of sulfur compounds Signup and view all the answers

What is the common effect of pores on a material's structure?

Makes it brittle and decreases mechanical properties Signup and view all the answers

What is the difference between fatigue and corrosion fatigue?

Fatigue cracks are typically intragranular Signup and view all the answers

What process is recommended to prevent hydrogen damage?

Applying tempering process up to a maximum of 200°C Signup and view all the answers

What is the impact of pores on a material's surface?

Can cause surface cracks Signup and view all the answers

What is a common preventive measure for fatigue corrosion?

Decreasing or removing stress in the material Signup and view all the answers

What is pitting corrosion primarily characterized by?

Corrosion focusing on narrow regions Signup and view all the answers

What conditions can cause pitting corrosion?

Environments rich in Cl- and Br- Signup and view all the answers

How does pitting corrosion affect the overall metal loss compared to homogeneous corrosion?

Total metal loss is much smaller Signup and view all the answers

Which method is suggested to slow down the dissolution process in pitting corrosion?

Increasing the flow rate of solution Signup and view all the answers

What is crevice corrosion primarily characterized by?

Corrosion in narrow crevices Signup and view all the answers

Where does crevice corrosion typically occur?

Under the heads of gaskets, rivets, and bolts Signup and view all the answers

What is one of the main problems associated with erosion corrosion?

It occurs in elbows, T-pipes, valves, pumps, mixers, and heat exchangers. Signup and view all the answers

How can solid particles in the environment impact erosion corrosion?

They can play an abrasive role and increase the corrosion rate. Signup and view all the answers

Corrosion Types and Passivation Process Quiz

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