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Crevice Corrosion Testing

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Crevice Corrosion Testing

Crevice corrosion refers to a kind of local corrosion when the migration of medium is blocked in the narrow gap between metal and metal and between metal and non-metal in the presence of electrolyte solution. Holes, gasket contact surface, lap joint, sediment, fastener crevice are the places where crevice corrosion often occurs. All metals that rely on oxide film or passivation layer to resist corrosion are particularly prone to this kind of corrosion. Crevice corrosion occurs in many media, especially in oxygen-containing media. Crevice corrosion is also a kind of electrochemical corrosion. The crevice corrosion will lead to the decrease of the strength of the parts, and the matching degree will become worse. The increase of the volume of corrosion products in the crevice will cause local additional stress, which not only makes assembly difficult, but also reduces the bearing capacity of components. T,C&A Lab provides you with crevice corrosion tests for stainless steel/alloy and metal products used in energy, aerospace, infrastructure, environment and industry to test the crevice corrosion resistance of the product.

Methods and standards we test to

ASTM G48 Method BFerric Chloride Crevice Test
ASTM G48 Method DCritical Crevice Temperature Test for Nickel-base and Chromium-bearing Alloys
ASTM G48 Method FCritical Crevice Temperature Test for Stainless Steels
ASTM G192Determining the Crevice Repassivation Potential of Corrosion-Resistant Alloys Using a Potentiodynamic-Galvanostatic-Potentiostatic Technique
ASTM G78Standard Guide for Crevice Corrosion Testing of Iron-Base and Nickel-Base Stainless Alloys in Seawater and Other Chloride-Containing Aqueous Environments
ASTM F746Standard Test Method for Pitting or Crevice Corrosion of Metallic Surgical Implant Materials
ASTM G46Standard Guide for Examination and Evaluation of Pitting Corrosion

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

Evaluation of crevice corrosion test

  • Crevice corrosion: Weightlessness corrosion rate

  • Crevice corrosion electrochemistry: Corrosion potential, polarization current and time relationship curve, corrosion observation

Instruments and data

Crevice-Corrosion-Testing
Crevice-Corrosion-Testing
Crevice-Corrosion-Testing
Crevice-Corrosion-Testing

Reference

  1. Wang, C. G.; et al. Crevice Corrosion of Several Supper Stainless Steels in the Simulated LT-MED Environment. Acta Metallurgica Sinica (English Letters) 31.11 (2018): 1137-1147.

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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