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Corrosion Inhibitor Testing

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Corrosion Inhibitor Testing

Corrosion inhibitors refer to those substances that play a protective role on the metal surface, and the addition of a small amount of these chemicals can significantly reduce the corrosion rate of metal materials in the medium to zero. At the same time, it can keep the original physical and mechanical properties of metal materials unchanged. Reasonable use of corrosion inhibitors is an effective way to prevent corrosion of metals and their alloys in environmental media. Especially in the production and processing of petroleum products, chemical cleaning, atmospheric environment, industrial water and petrochemical production, corrosion inhibition technology has become one of the main anti-corrosion methods. T,C&A Lab's corrosion inhibitor testing laboratory can conduct a comprehensive evaluation of corrosion inhibitors, ranging from corrosion rate testing to compatibility testing.

The test solutions we provide include but are not limited to:

  • Corrosion rate testing

The test of corrosion inhibitor performance is actually to test the corrosion rate of the metal, that is, to test the corrosion rate of the metal before and after adding the corrosion inhibitor to the corrosive medium under different conditions, and to determine the corrosion efficiency and the best use conditions after comparison. We provide the following methods for corrosion rate testing:

Weight-loss method

The corrosion rate of the metal sample under this condition is determined by weighing the mass loss of the metal sample after re-invading the corrosion medium for a certain period of time, so as to evaluate the corrosion inhibition performance of the corrosion inhibitor. This method is only effective for overall corrosion.

Electrochemical method

The electrochemical method is an indirect method, in which the electrode is polarized by "cathode" and "anode" at first, and the corrosion current density is calculated according to the polarization curve, and then the corrosion rate is converted. We provide the following electrochemical methods for corrosion rate testing:
Potentiodynamic polarization methods
Linear polarization resistance (LPR)
Electrochemical impedance spectroscopy (EIS)
Electrochemical noise (EN)

  • Compatibility testing

Compatibility with metallic materials
Compatibility with non-metallic materials
Foam test
Emulsion test
Sticky deposit
Storage stability
Solvent loss
Solubility and solvent compatibility test
Thermal stability test
Oil/water partitioning test
Aging test

Standards we test to

ASTM G3Standard Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing
ASTM G5Standard Reference Test Method for Making Potentiodynamic Anodic Polarization Measurements
ASTM G31Standard Practice for Laboratory Immersion Corrosion Testing of Metals
ASTM G46Standard Guide for Examination and Evaluation of Pitting Corrosion
ASTM G59Standard Test Method for Conducting Potentiodynamic Polarization Resistance Measurements
ASTM G61Conducting Cyclic Potentiodynamic Polarization Measurements for Localized Corrosion Susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys
ASTM G71Conducting and Evaluating Galvanic Corrosion Tests in Electrolytes
ASTM G102Calculation of Corrosion Rates and Related Information from Electrochemical Measurements
ASTM G106Verification of Algorithm and Equipment for Electrochemical Impedance Measurements
ASTM G108Electrochemical Reactivation (EPR) for Detecting Sensitization of AISI Type 304 and 304L Stainless Steels
ASTM G170Evaluating and Qualifying Oilfield and Refinery Corrosion Inhibitors in the Laboratory
ASTM G185Evaluating and Qualifying Oil Field and Refinery Corrosion Inhibitors Using the Rotating Cylinder Electrode
ASTM G202Standard Test Method for Using Atmospheric Pressure Rotating Cage
ASTM G215Standard Guide for Electrode Potential Measurement
ISO 6614Petroleum Products — Determination of Water Separability of Petroleum Oils and Synthetic Fluids
ISO 16773Electrochemical Impedance Spectroscopy (EIS) on Coated and Uncoated Metallic Specimens
NACE TM0169Standard Guide for Laboratory Immersion Corrosion Testing of Metals
NACE TM0196Chemical Resistance of Polymeric Materials by Periodic Evaluation-HD1996

In addition, the experts in our Corrosion Inhibitor Testing Laboratory also provide a variety of custom tests as you need. Let's discuss the customized service with our experts for free.

Instruments and data

Pitting Corrosion Testing
Pitting Corrosion Testing
Pitting Corrosion Testing
Pitting Corrosion Testing

References

  1. Whitfield, Stephen. Improving Corrosion Inhibition Fluids and Techniques in Offshore Projects. Oil and Gas Facilities 4.03 (2015): 18-23.
  2. Yépez, O.; et al. Development of novel phosphate based inhibitors effective for oxygen corrosion. Part I: rotating cage autoclave study. Corrosion/2015, paper 6163 (2015).

Note: the service is for research use only and not intended for any clinical use.

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T,C& A LAB is an independent lab providing quality or custom testing, characterization and analysis of a variety of materials. Our engaged experts are ready to help you.

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