Over the years ACM have built up a collection of test techniques applicable to standard instruments such as Gill 8/AC, or Field Machine:
  • AC Impedance (EIS) a series of sine waves from start to finish frequencies. Potential and galvanic response for each wave is stored, from which Z Real, Z Imaginary, Bode Impedance and Bode Theta are calculated.
  • Current & Voltage - continuous measurement of potential and galvanic readings. Maximum read rate is limited by the mains frequency, 50 per second for 50Hz and 60 per/sec for 60Hz,
  • Cyclic Sweep - sweeps between two potentials over a number of cycles, or half cyles,
  • Harmonic Analysis extracts first, second and third harmonics and calculates corrosion rate,
  • Potential Measurement & Galvanic Measurement,
  • Potentiostatic - hold offset potential and measure current response,
  • Galvanostatic - maintain offset current and measure potential response,
  • Galvanic Sweep potential is measured whilst current is swept,
  • Linear Polarisation (LPR) both sweep and step (more resilient) tests available, results plotted as LPR result vs time, or corrosion rate, 
  • Voltage Input measure external potentials, thermocouple inputs can be specified,
  • IR Compensation typically used for measurement of concrete samples or other high impedance samples,
  • Weld Testing many of the standard techniques can be supplied for weld testers, 5 simultaneous weld measurements.

More exotic, or custom created techniques:

  • L.C.M.TM  Localized Corrosion Monitoring developed by Baker Petrolite,
  • Custom Sweep finer control of sweeps, pauses and offsets
  • Multiphase Flow ACMs own designed technique (patent pending), for use in multiphase environments, more details here,
  • Temperature Measurement Platinum Resistance Thermometers (PRT) give the highest accuracy measurement, 
  • ER electrical resistance, precision measurement of ER probes,
  • GPS Positioning add-on for field machine to log position, later plotted on a map,
  • Critical Pitting Temperature details here,
  • Current Step Polariser define precise current steps whilst potential is measured,
  • Heater & Stirrer Control from within seqencer heaters and stirrers can be controlled,

There are endless options with ACM, we are masters of bespoke system design,  always happy to discuss individual requirements.