Corrosion Monitoring
CORROSION MONITORING

Corrosion control costs worldwide amount to billions of dollars, with potential failures posing serious risk of:

  • damage to capital assets
  • production loss and downtime
  • safety and environmental hazards

The occurrence of corrosion is inevitable, and although there are various options available in the market to help reduce its effects (such as chemical inhibitors, cathodic protection, coatings, metallurgy selection), the most important step is to clearly identify where, at what rate and why the corrosion is happening. Clear identification of the problem parameters will see quicker and more effective control without wasting time and resources focusing on non-priority areas.
Credit1

Caproco focuses on direct, on-line techniques of internal corrosion monitoring. The following table shows the most common monitoring methods Caproco enlists:

Internal Corrosion Rate Monitoring

Corrosion Control Effectiveness Monitoring

  • Corrosion Coupons
    • Weight Loss
    • Stress
    • Scale
    • Corrosion Rings
  • Corrosion Probes
    • Electric Resistance
    • Polarization Resistance
    • Hydrogen
    • Galvanic
    • Bacterial
    • Sampling
    • Corrosion/Erosion
    • Reference Electrode

Process Variable Monitoring

  • Process Stream Sampling
  • Process Component Injection
  • Abrasion Rate Probe
  • pH Probe
  • Temperature Probe
  • Pressure Probe
  • Sand Probe

Corrosion Control

  • Inhibitor Injection
  • Sacrificial Anodes

Scale Control

  • Scale Inhibitor Injection
  • Scale Build Up Monitoring

Bacteria Control

  • Bactericide Injection
  • Bacteria Build Up Monitoring

Hydrate Control

  • Glycol and Alcohol Injection
  • Temperature Probe

Other Applications

  • System Bleed Off
  • Pig Passage Indicator
  • Access for System Clean Out
  • Access for Sand-Frac Operations

Once the source, type and aggressiveness of the corrosion has been identified, you can make an informed decision on which accepted market practice(s) you want to employ to control the problem.

Seven Approaches to Dealing with Corrosion
  • Material Choice
  • Protective Coatings
  • Cathodic Protection
  • Inhibition
  • Treatment of Environment
  • Structural Design
  • Scheduled Maintenance

 

1 Photo courtesy of the Office of Response and Restoration, National Ocean Service, National Oceanic and Atmospheric Administration