Corrosion Assessment

Osmose corrosion investigation programs locate and assess deterioration on steel transmission structures and identify those in need of repair, helping utilities avoid costly replacements.

Comprehensive Inspections vs. Partial Predictive Inspections

During a comprehensive inspection, each leg of the structure is excavated to a depth of 18 to 24 inches. This is the ideal inspection method for obtaining structural condition information in the critical transitional zone of the steel structure, and it allows for protective coatings to be applied. Predictive inspections provide an effective, less costly approach that targets "the worst of the worst" conditions on a structure. During a predictive inspection, one leg or section of the structure may be excavated. Based on the findings in that area (including structural condition and the presence of corrosion or the presence of corrosive factors), a prediction is made as to the condition of the tower or structure.

 


Structural Ratings & Corrosion Potential Assessment

The assessment process involves both a structural assessment and a corrosion potential assessment. During the structural assessment, each member of each tower is assessed and assigned a structural rating based on the extent of existing corrosion and its ability to support loads. During the corrosion potential assessment, each structure is evaluated and given a rating based on the likelihood of future corrosion. This comprehensive rating is indicative of its current corrosive condition and its potential for future deterioration based on environmental factors.

Non-Destructive Evaluation (NDE) Options

When non-destructive evaluation of an asset is necessary, skilled and experienced Osmose technicians utilize electromagnetic acoustic transducer (EMAT) technologies such as Intelli-PoleTM and Anchor-InspectorTM to help identify below-grade structural defects. These technologies are types of NDE designed to estimate the extent of defects in conductors, steel poles, stub angles and guy anchors. EMAT technologies are particularly useful for inspecting structures that cannot be excavated, or for structures that have been classified as having severe corrosion potential and require further evaluation without the risk of excavation.

Data Deliverables

All relevant data - both structural and environmental - collected during the assessment process is recorded and delivered to the utility. Customers receive raw data as well as project summary reports which summarize the findings and provide recommendations for logical and cost-effective next steps.

For more information on corrosion assessment, please contact Kevin Niles at 716-523-3354 or [email protected]

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