Table of Contents
Major Take-aways on Intergranular Corrosion
Understand Intergranular Corrosion
How to Avoid intergranular Corrosion
Testing standards
Five Major Acid Tests
Join Telegram
Subscribe YoutTube Handle: @EPCLand
QuizLand Video Playlist
Attempt Questions on Intergranular Corrosion
1. What is the primary cause of intergranular corrosion in stainless steel piping systems?
Choose the correct answer:
Explanation: Intergranular corrosion in stainless steel piping systems is primarily caused by sensitization of grain boundaries due to exposure to certain temperatures during welding or improper heat treatment.
2. Which type of stainless steel is most susceptible to intergranular corrosion?
Choose the correct answer:
Explanation: 304 stainless steel is more susceptible to intergranular corrosion due to sensitization of grain boundaries, especially after exposure to temperatures within the range of 450°C to 850°C.
3. How can intergranular corrosion in stainless steel piping systems be prevented?
Choose the correct answer:
Explanation: Intergranular corrosion can be prevented in stainless steel piping systems by properly controlling welding procedures and heat treatment to avoid sensitization of grain boundaries.
Quiz on Intergranular Corrosion
Quiz Land: Piping Engineering
FAQs on Intergranular Corrosion (IGC)
What is Intergranular Corrosion (IGC)? Intergranular corrosion is a form of corrosion that occurs preferentially along grain boundaries of a material, typically due to sensitization or other metallurgical changes.
What causes Intergranular Corrosion in piping systems? IGC is commonly caused by sensitization of stainless steels, where chromium carbides precipitate along grain boundaries, depleting chromium in the surrounding areas and making them susceptible to corrosion.
How can sensitization lead to Intergranular Corrosion? Sensitization occurs when stainless steel is heated in a temperature range (around 450-850°C), causing chromium carbides to precipitate at grain boundaries, reducing the alloy’s corrosion resistance.
Which materials are most susceptible to Intergranular Corrosion? Austenitic stainless steels such as 304, 316, and their variants are particularly susceptible to IGC if not properly heat-treated or if exposed to sensitizing temperatures during welding or processing.
How can Intergranular Corrosion be detected in piping systems? IGC can be detected through visual inspection, dye penetrant testing, or by conducting corrosion tests like the ASTM A262 Practice A test for detecting susceptibility to intergranular attack.
What are the consequences of Intergranular Corrosion in piping? It can lead to premature failure of piping systems, especially in critical applications where corrosion resistance is essential for structural integrity and safety.
How can Intergranular Corrosion be prevented in piping systems? Prevention methods include using low-carbon variants of stainless steel, applying post-weld heat treatment, choosing appropriate welding procedures, and avoiding sensitizing temperatures during fabrication.
What are the standards or guidelines related to Intergranular Corrosion testing? ASTM A262 is a widely recognized standard for detecting susceptibility to intergranular attack in austenitic stainless steels.
Can Intergranular Corrosion occur in non-stainless steels? Yes, although less common, it can occur in other alloys where grain boundary precipitation of detrimental phases reduces corrosion resistance.
Is Intergranular Corrosion reversible once it starts in piping systems? Once intergranular corrosion initiates, it typically progresses and is not reversible without corrective measures such as repair or replacement of affected components.
12 Recommended Courses on Piping Engineering
- Complete Piping Engineering Course
- Basics of Piping Engineering
- Piping Layout Engineering
- Piping Material Engineering
- Piping Stress Analysis
- Piping Material Specifications(PMS)
- Piping Material Requisitions (MR)
- Pipe Thickness Calculations: ASME B 31.1, 31.12, 31.3
- Piping Deliverables & Non-Deliverables
- Piping Material-Metallurgy: Mechanical Properties & Testing
- Basic Elements of Piping Engineering
- Reinforcement Pad Calculations for Pipe Branch
Top 20 Recommended Quizzes (Video + Quiz)
- Piping Codes, Standards, Specifications & Best Practices: Piping Quiz
- 12 Major Difference b/w ASME B31.1 & ASME B31.3: Piping Quiz
- Difference b/w ASME B31.3 & ASME B31.12: Piping Quiz
- What is ASTM & What exactly it does: Piping Quiz
- Piping Deliverables & Non-Deliverables: Piping Quiz
- API 600: Piping Quiz
- API 598: Piping Engineering
- Hydrogen Induced Cracking: Piping Quiz
- Sulphide Stress Corrosion Cracking: Piping Quiz
- Stub-in & Stub-on Connections: Piping Quiz
- Pipe Inspection: Piping Quiz
- Non-Destructive Testing: Piping Quiz
- Destructive Testing: Piping Quiz
- Ferrite Testing: Piping Quiz
- Intergranular Corrosion: IGC: Piping Quiz
- Grain Test: Piping Quiz
- P Number, F numbers & A Numbers: Piping Quiz
- Piping Activities: Piping Quiz
- Inch Dia & Inch Meter: Piping Quiz
- Kick-off Meeting: Piping Quiz
Top 10 Detailed Videos
- Piping Engineering II Scope & Role II Career Options II How to be Piping expert (45 Minutes)
- Codes, Standards, Specifications & Best Practices II Differences & Advantages (0.5 Hours)
- Stub-in & Stub-on II Pipe Branch Connections (15 minutes)
- Metallurgical Testing II Pipe Inspection & Testing (45 minutes)
- Non-Destructive Testing II Pipe Inspection & Testing (20 Minutes)
- Piping Deliverables II Non-Deliverables II Piping Engineering
- Process Datasheet II Tank Data Sheet II Pump Data Sheet II Process Engineering (1 Hour)
- Part-1 II 2Minutes Funda Series II Piping Engineering (1.5 Hours)
- Part-2 II 2Minutes Funda Series II Piping Engineering (2 Hours)
- Questions & Answers II Piping Engineering II Set of 100 Q & A II Interview Questions (2 hours)