Home About Us Analytical Techniques Problem Solving Analysis Consultancy Industrial Sectors Contact Us
Main Index
Inhibitor Dose Detemination to Mitigate Corrosion
Main Index
SEM/EDX Particle Analysis
Materials Analysis
Chemical Analysis
Physical Structural and Microstructural Analysis
Typical Technical Expertise

Contact Us
Print this page

Determining the minimum inhibitor dosage required to mitigate corrosion is critical to protect metals and alloys and aligned to maintence cycles to minimise cost.

The desired inhibitor concentration depends on the aggressiveness of the environment, type of metal and type of inhibitor. More often than not experimental testing is required to determine the necessary concentration for each case. Adding more than the required concentration usually does not improve the performance significantly; it only increases the cost of the treatment.

LPD Lab Services can perform electrochemical corrosion testing, using a potentiostat, to determine the corrosion rate in a number of different concentrations. The corrosion rate is then plotted versus the concentration to aid visual assessment of the effect of the inhibitor as a function of its concentration.

CorrosionRate vs Concentration to Determine Inhibitor DoseFrom the graph in this example it is seen that little additional benefit is obtained by increasing the inhibitor concentration above 3.5 %. It may be decided, for that reason, to control the dosing level at 3.5 %. Optimum cost considerations may dictate that a relatively inexpensive part only needs to last from one yearly overhaul to another and a maximum corrosion rate of 1.0 mm/year is satisfactory. In that case the dosing level could be controlled at 1.4 %.

Copyright 2024 LPD Lab Services Ltd. All rights reserved.