API 510 Corrosion Mechanisms & Damage Assessment

Question 1

What is a common form of corrosion found in carbon steel pressure vessels?

Accepted Answer

Uniform corrosion

Answer

Pitting corrosion

Answer

Stress corrosion cracking

Answer

Galvanic corrosion

Question 2

Which mechanism best describes chloride-induced pitting in stainless steels?

Accepted Answer

Pitting corrosion

Answer

Galvanic cell formation

Answer

Crevice corrosion

Answer

Erosion corrosion

Question 3

Which environment is most likely to cause stress corrosion cracking (SCC)?

Accepted Answer

Chloride-rich and tensile stress conditions

Answer

Neutral water

Answer

High pH alkaline solution

Answer

Dry atmosphere

Question 4

What is the most appropriate inspection technique for detecting internal corrosion?

Accepted Answer

Ultrasonic thickness testing

Answer

Visual inspection

Answer

Radiographic testing

Answer

Magnetic particle testing

Question 5

What type of damage is typically associated with hydrogen blistering?

Accepted Answer

Localized metal lifting and blister formation

Answer

Cracking at grain boundaries

Answer

Loss of wall thickness

Answer

Surface oxidation

Question 6

How can galvanic corrosion be mitigated?

Accepted Answer

Using sacrificial anodes

Answer

Increasing fluid temperature

Answer

Polishing the surface

Answer

Decreasing fluid flow

Question 7

Which technique is used to identify corrosion under insulation (CUI)?

Accepted Answer

Radiographic or guided wave ultrasonic testing

Answer

Dye penetrant testing

Answer

Visual inspection

Answer

Magnetic particle testing

Question 8

What is the typical appearance of pitting corrosion?

Accepted Answer

Localized deep holes

Answer

Uniform dulling

Answer

Large scale cracks

Answer

Surface blisters

Question 9

Which material is most resistant to corrosion in acidic environments?

Accepted Answer

Hastelloy

Answer

Mild steel

Answer

Cast iron

Answer

Aluminum