A prerequisite for safe operation is the understanding of how materials perform under normal operating conditions, as well as under unintended exposure.

Around 30 percent of the incidents and leaks that occur in offshore process facilities are related to corrosion and erosion. Corrosion management is therefore essential in order to maintain the integrity of the facility. As the requirements for improved productivity and cost effectiveness increase, combined with an accelerated attention to safety and environmental issues, activities related to corrosion management play an increasingly important role.

To obtain an optimal control of integrity, all relevant data must be used, including data on process and production, corrosion and erosion as well as inspection and maintenance. The key to success is related to the complete management of all data available, achieving corrosion control, ensure focus on high-risk items, and thereby reducing the amount of hydrocarbon leaks and number of unplanned shut-downs due to material degradation.

We provide:

  • Material selection and verification
  • Corrosion management
  • Corrosion monitoring
  • Corrosion modelling and assessment

Corrosion management

Corrosion management is a dynamic approach where we control and monitor an asset’s technical integrity related to material degradation such as corrosion, erosion, cracks and fatigue. It is a part of the overall management system, and is described in a Corrosion Management Strategy.

A corrosion management strategy aims to define roles and responsibilities and ensure ownership, ensure focus on high risk system and identify barriers and Key Performance Indicators (KPI).

Four steps of a continuous cycle:

  • Planning: A detailed plan is established based on results from a risk assessment, and includes inspection, monitoring and mitigation programs.
  • Implementation: Implementation of defined and planned activities and programmes as well as identifying KPIs in order to measure critical parameters, and to ensure corrosion control. 
  • Measure: Measure and evaluate KPIs and data from inspection activities as well as monitoring and mitigation activities, and prepare status reports and improvements. We collect, compare and present data through a corrosion management information system. 
  • Improve: Review the effectiveness of the corrosion management programs, and improve the corrosion management activities and take necessary actions. 

Corrosion assessment and modelling 

Corrosion assessment 

Corrosion performance sets the premises for material selection for new installations. In addition, there is a demand for evaluation of corrosion and other degradation mechanisms to ensure further operation as a consequence of process modifications, life extensions and incidents. Corrosion assessments are also an integrated part of material degradation risk assessments or risk based inspection where corrosion performance under various conditions is essential. When appropriate, recommendations for corrosion control and mitigating actions are given. In-depth knowledge of degradation mechanisms and extensive field experience are the foundation of our corrosion evaluations. 

Corrosion assessments are the foundation for

  • Material selection
  • Degradation risk assessments (RBI)
  • Failure investigations 

The assessment covers both internal and external environment, and include; fluid characteristics, content of CO2, H2S, and O2, water chemistry, production chemicals and bacterial activity. Operating conditions, environmental exposure and insulation are also evaluated.

Corrosion modelling

We prefer to use models for degradation rate predictions. However, good models are only available for certain environments. Under more complex conditions, in-depth knowledge on material performance, field experience and literature surveys are basis for our analyses.

Recognised models are used for CO2 corrosion (e.g. NORSOK M-506) and exposure to H2S containing environment (ISO 15156). From years of experience, we have developed in-house models for galvanic corrosion, H2S and O2 corrosion as well as MIC (microbial induced corrosion). Our software tool, CorPos-AD, which is used for corrosion predictions in pipeline, includes all these models.

In order to evaluate corrosion resistant alloys for seawater applications, we utilise our understanding of electrochemistry and material characteristics.

Consultancy and Expertise

We offer detailed knowledge and expertise, tailored to your specific needs. With us on the task, you can feel confident in having a dedicated and experienced team of people on your side. In addition, our specialists within areas ranging from material technology, integrity management to monitoring, structural integrity and inspection, make us a preferred supplier and partner in the offshore industry. 

Do not hesitate to contact us you would like to receive more information, or if you have any questions or inquiries.