Corrosion Control

We understand that municipalities put years of effort and significant financial resources into the design and construction of their systems, but there are sometimes environmental and geotechnical factors that can reduce the lifetime and reliability of these facilities. With industry-leading, in-house expertise on these issues, RH2 can assist with extending the life expectancy of a system’s infrastructure by controlling corrosion.

Offered Services

You put years of effort and significant financial resources into the design and construction of your system. Extend the life expectancy of your infrastructure by controlling corrosion.

RH2’s corrosion engineering experts provide the following services:

Design & Specifications

We can provide plans and specifications to support your upcoming construction projects for pipeline, reservoir, and structure protection or repair.

Pipeline Integrity and Protection

RH2 has designed tens of thousands of feet of protected pipeline for many sizes and materials of pipe. Systems have used galvanic cathodic protection systems with joint bonding, impressed systems with rectifiers, bonded coating systems, and unbonded coating systems such as polyethylene encasement to protect pipelines against corrosive soils and potential stray current. RH2 will work with you to analyze the level of protection that your utility requires, the risks and service lifetime your utility will experience, and effective measures to achieve pipeline protection.

  • Soil corrosivity testing
  • Cathodic protection systems
  • Sacrificial (Galvanic) and impressed current
  • Commissioning, calibration, and testing
  • Condition assessment for existing pipelines
  • Stray current testing

Coatings and Linings

RH2 will select a coating or lining design suitable for your application and develop specifications to ensure a high quality end product. RH2 understands that the coating selection and installation now can impact the project for many years to come. If you have experienced a coating failure, RH2 will perform an analysis to determine the cause and recommend a solution.

  • Condition Analysis to optimize touch-ups, overcoats, or replacement
  • Failure Analysis
  • Environmental Health and Safety Considerations

Services During Construction and Commissioning

Submission review, inspection, and commissioning assistance for technically specific elements, such as cathodic protection systems.

Failure Analysis

Evaluation based on physical, environmental, and electrochemical factors.

Inspection and Condition Assessment

Evaluation of existing system and determination of recommended repairs, necessary replacements, and efficacy of systems.

Specialty Testing

RH2 can perform field and bench testing for soil analysis to ensure appropriate coorosion protection systems are selected to meet in-situ conditions. Above-grade tests, such as a Wenner 4-pin soil resistivity test and a surface potential gradient, can be performed to complement a traditional geotechnical investigation. In addition, RH2 will perform current requirement and interference testing to appropriately design a cathodic protection system.

  • CO2/H2S Corrosion
  • Microbiologically Influenced Corrosion
Electric conductivity test in progress

Electric Rail Systems and Utilities

Stray current from electric rail systems such as Sound Transit’s Light Rail or Portland's MAX Light Rail are a growing element of urban transportation systems, but their proximity to utilities requires design coordination with utility providers. RH2 can write the specifications necessary to protect utilities in proximity to rail corridors and can ensure proper designs are incorporated for protection during utility design or relocation.

  • Utility design in electric rail corridors
  • Stray current monitoring testing
  • Track to earth testing
  • Diagnostic troubleshooting
Reservoir protected by cathodic system

Tank Cathodic Protection Design

RH2 will design a cathodic protection system to ensure the metallic components of tanks and reservoirs continue to perform throughout their service life. Coated steel and glass-fused steel can both benefit from cathodic protection systems designed to ensure corrosion of metallic components does not occur. Design of a cathodic protection system can be performed concurrently with a reservoir's original design or as a retrofit as needed.

  • Design for new or existing tanks
  • Calibration
  • Commissioning

Corrosion of Reinforced Concrete

  • Cathodic protection design
  • Inspection, rehabilitation, and repair
Corroded piece

Beyond Waterworks

The body of knowledge of corrosion control can be applied to industries beyond waterworks.

  • Oil/gas facilities
  • Marine applications, such as docks, pilings, and sea walls
  • Electrical grounding beds