Monitoring Corrosion and Scale

Common monitoring methods include:

• Monitoring changes in pressure, temperature and/or production
• Weight loss coupons (gives only average rate)
• Test nipples or spools, subs (more costly to install and recover)
• Caliper surveys for tubing (disrupts production, which adds to cost)
• Product residuals (corrosion deposit analyses)
• Inhibitor residual analysis
• Iron counts
• Bacteria counts
• Bio-Film monitoring
• Scale coupons
• Brine analyses
• Corrosion instruments (electrical)
• Copper Ion Displacement (CID) tests (work only in certain areas)
• LPR, ER, or Induction probes
• PAIR instruments (reads instant corrosion rates but must have conductive media over probe)
• Electronic resistance instruments (fairly quick, but can give false readings with pits or deposits)
• Hydrogen patches/probes (indirect measurement)
• Failure record keeping and visual inspection (after failures have occurred)
• Failure analysis

Other tools that are sometimes used include A/C Impedance and electrochemical noise instruments.

Back to corrosion prevention