Damage Mechanism & Corrosion Analysis

Understand the Damage Before It Becomes a Failure. 

Corrosion and material degradation rarely occur without a cause. 

Changes in temperature, pressure, process chemistry, material condition, flow velocity, water chemistry, operating cycles, and environmental exposure can gradually create damage that may not be immediately visible. 

The key question is therefore not simply: 

“Where is the corrosion?” 

It is: 

“Why is the damage occurring, how will it develop, and what could it mean for equipment integrity?” 

Damage Mechanism & Corrosion Analysis provides a structured approach to identifying the mechanisms responsible for equipment degradation, evaluating their potential impact, and developing appropriate strategies for inspection, monitoring, mitigation, and integrity management. From Damage Observation to Damage Mechanism 

Inspection findings provide evidence of damage, but the visible damage is only part of the story. 

Understanding the underlying damage mechanism is essential to determine how the condition may develop and where similar damage may occur elsewhere in the system. 

The assessment considers the relationship between: 

Material → Process Conditions → Operating Environment → Damage Mechanism → Damage Rate → Equipment Integrity 

This helps transform inspection data into a better understanding of the causes and potential progression of degradation. 

Understanding Corrosion and Degradation 

Different operating environments can produce different forms of corrosion and material degradation. 

• Corrosion 

• Erosion 

• Cracking  

• CUI 

• Scaling & Fouling 

• Wear & Abrasion 

• Oxidation 

• Degration  

Damage Mechanism Assessment 

Identifying the correct damage mechanism is critical to developing an effective integrity management strategy. 

The assessment may consider: 

• Material 

• Process Conditions 

• Operating History 

• Inspection History 

• Environmental Conditions 

From Damage Mechanism to Corrosion Rate 

Understanding how quickly damage is progressing is an important part of corrosion management. 

Historical inspection data can be evaluated to determine corrosion trends and estimate potential future degradation. 

Inspection Data → Thickness History → Corrosion Rate → Future Thickness → Integrity Assessment 

Where sufficient data are available, corrosion rate assessment can support the evaluation of remaining wall thickness, inspection intervals, monitoring requirements, and future integrity conditions. 

The assessment also considers uncertainty in inspection measurements, changes in operating conditions, and the applicability of historical corrosion rates to future service. 

Corrosion Analysis for Critical Equipment 

Damage mechanism and corrosion analysis can be applied across a wide range of industrial and power generation equipment. 

• Piping Systems 

• Pressure Vessels 

• Heat Exchangers 

• Storage Tanks 

• Rotating Equipment 

• Other Related Equipment: Furnaces, Reactors 

Standards & Methodologies 

Damage Mechanism & Corrosion Analysis can be supported by recognized international standards, engineering methodologies, and industry practices. 

API Standards 

• API 571 — Damage Mechanisms Affecting Fixed Equipment in the Refining Industry 

• API 580 / API 581 — Risk-Based Inspection principles and methodologies 

• API 510 — Pressure Vessel Inspection 

• API 570 — Piping Inspection 

• API 579-1 / ASME FFS-1 

Supporting Predictive Integrity Management 

Corrosion analysis should not only explain what has already happened. 

It should also help answer: 

“What is likely to happen next?” 

By combining damage mechanisms, inspection history, operating conditions, and degradation trends, organizations can develop a more proactive approach to equipment integrity. 

This supports the transition from: 

Reactive Inspection → Understanding Damage → Predictive Monitoring → Proactive Integrity Management 

The Value of Damage Mechanism & Corrosion Analysis 

A structured damage mechanism and corrosion analysis can help organizations: 

• Understand the root causes of equipment degradation 

• Identify susceptible equipment and locations 

• Evaluate corrosion and degradation rates 

• Improve inspection effectiveness 

• Optimize inspection intervals 

• Develop targeted corrosion monitoring programs 

• Support RBI and FFS assessments 

• Identify potential life-limiting damage mechanisms 

• Reduce the risk of unexpected equipment degradation 

• Strengthen long-term asset integrity management 

Deliverables 

• Damage mechanism analysis report with root cause identification 

• Corrosion/defect evaluation and risk assessment 

• Recommendations for migration, monitoring, inspection and maintenance  

Understand the Mechanism. Predict the Damage. Protect the Asset. 

Damage Mechanism & Corrosion Analysis provides the technical understanding needed to identify why degradation occurs, how it may progress, and what actions can be taken to manage equipment integrity throughout its operating life.