Cyclic Polarization Measurements—Experimental Procedure and Evaluation of Test Data
There are two basic methods of electrochemical measurement for materials selection and evaluation:
Matergenics has six Gamry systems to meet your electrochemical testing requirements
Electrochemical corrosion tests include the following techniques:
Samples for electrochemical corrosion testing must utilize electrical conductors and must be small enough to fit in the polarization cell. Components can be tested as a whole or as a smaller section. Metal coupons are specially prepared for some tests.
EIS technique is used to evaluate materials and coatings in corrosive environments. EIS measures impedance of the coating at different frequencies. This is an indication of barrier effect of the coating. Barrier coating will exhibit high impedance in corrosive exposures. Changes in electrical properties determined by EIS experiments have been found to closely resemble long-term performance of coatings.This way EIS method can detect deterioration at metal/coating interfaces well before defects become visible, and with greater accuracy than artificial testing methods such as salt spray.
Electrochemical Corrosion Cells
The above photos show various “Electrochemical Corrosion Cells” at our electrochemical laboratory to test corrosion of bare or painted test coupons
Impedance Measurements on Organic Coatings on Mild Steel in Sodium Chloride Solutions Impedance Spectroscopy provides very useful information about protective coatings. The above plots clearly exhibits how good the coating is!
An Electrochemical Technique to Measure Diffusible Hydrogen in Metals We have four Hydrogen Permeation Cell Set ups to Determine Hydrogen Diffusivity , permeability Through Metals
Electrochemical Techniques used for Corrosion Measurements:
Scanning Reference Electrode Techniques in Localized Corrosion
Potential Dependence of Localized Corrosion in Iron
A Method for Quantifying the Initiation and Propagation Stages of Crevice Corrosion
A Strain-Control Technique for Assessing the Corrosion-Fatigue Sensitivity of Stainless Steels
Electrochemical Impedance Techniques in Corrosion Science
A Corrosion Monitor Based on Impedance Method
Impedance Measurements on Organic Coatings on Mild Steel in Sodium Chloride Solutions
Digital Faradaic Impedance Measurements on Corroding Copper in Acid Solutions
Evaluation of Electrochemical Techniques for Monitoring of Atmospheric Corrosion Phenomena
Practical Experience with an Electrochemical Technique for Atmospheric Corrosion Monitoring
An Electrochemical Technique to Measure Diffusible Hydrogen in Metals (Barnacle Electrode)
Cyclic Polarization Measurements—Experimental Procedure and Evaluation of Test Data
Direct Measurement of the Corrosion Current for Oxygen-Reduction Corrosion
Electrochemical Behavior of Carbon Steel in Fused Salts
Galvanic Corrosion of Copper Alloys
Electrochemical Investigation of Cavitation-Corrosion Damages of a Pump Casing
A Method of Evaluating Polarization Curves for Stainless Steel via a Simple Passivation Model
Effect of Large Voltage Modulations on Electrodes Under Charge-Transfer Control
Progress in Mini-Potentiostat Development for Corrosion Testing
A Microprocessor-Based Corrosion Measurement System
We are here to help
We respond to all customers promptly by sending a technical proposal to address testing, investigation and the proposal costs. If we need more information, our engineers will contact you.
Whether you are a large corporation or a small enterprise, we will provide you with the attention you need and deserve. In so doing, we hope to work with you for many years to come.
Please call Dr. Zee at 412-952-9441 or 412-788-1263 and let us know how we can assist you in your electrochemical or corrosion investigation. Alternatively, you can send your request to info@matergenics.com.
Looking forward to hearing from you!