Materials Testing and Characterization

7.

Corrosion and Environmental Degradation Testing

7.1.

Electrochemical Techniques

7.1.1.

Potentiodynamic Polarization

7.1.1.1.

Measurement of Corrosion Rate

7.1.1.2.

Tafel Extrapolation

7.1.2.

Electrochemical Impedance Spectroscopy

7.1.2.1.

Principle and Data Interpretation

7.1.2.2.

Equivalent Circuit Modeling

7.2.

Immersion Testing

7.2.1.

Weight Loss Measurement

7.2.1.1.

Calculation of Corrosion Rate

7.2.1.2.

Test Duration and Conditions

7.2.2.

Visual Inspection and Surface Analysis

7.3.

Environmental Chamber Testing

7.3.1.

Salt Spray Test

7.3.1.1.

Test Procedure and Standards

7.3.1.2.

Evaluation of Corrosion Products

7.3.2.

Humidity and Temperature Cycling

7.3.2.1.

Accelerated Aging

7.3.2.2.

Effects on Material Properties

7.4.

High-Temperature Oxidation and Corrosion Testing

7.4.1.

Test Methods and Apparatus

7.4.2.

Measurement of Oxidation Kinetics

7.4.3.

Analysis of Oxide Scale Formation

7.4.4.

Evaluation of Protective Coatings

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6. Non-Destructive Testing and Evaluation

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1. Introduction to Materials Testing and Characterization