ASTM A262 Susceptibility to Intergranular Attack in Steel
MatX Lab runs chamber, electrochemical, and analytical methods to rank corrosion resistance, reproduce a service environment, or find the mechanism behind a corrosion failure. The work tells you whether a material will survive where it is going.
Corrosion is a single important factor that decides how long a material lasts in the real world, long after it passed every property check on day one. Corrosion and environmental testing measure how a metal, alloy, or coating degrades under salt, humidity, chemistry, and stress, and how well it resists them. MatX Lab runs chamber, electrochemical, and analytical methods to rank corrosion resistance, reproduce a service environment, or find the mechanism behind a corrosion failure. The work tells you whether a material will survive where it is going.
In this type of corrosion and environmental testing, it is evaluated how materials respond to corrosive and environmental exposure. Some methods accelerate real conditions in a chamber, such as salt spray and humidity cycling. Others measure corrosion directly, such as electrochemical polarization that gives corrosion rate and mechanism, or immersion tests that track mass loss. Together they rank resistance, reproduce service conditions, and explain why a material corroded.
Corrosion work depends on matching the method to the environment and the failure mode, and we scope the right approach. Each technique below links to its own page.
Accelerated corrosion exposure in a controlled salt-fog chamber to rank the corrosion resistance of coatings and alloys. It is the most widely specified corrosion screen.
To get accurate results alternating wet, dry, and salt cycles that reproduce real service conditions more closely than continuous salt spray.
Potentiodynamic polarization and impedance methods that measure corrosion rate and mechanism directly, including pitting, passivation, and susceptibility.
Controlled exposure to a corrosive liquid to measure mass loss and the nature of attack over time, for ranking and qualification.
When both stress and a corrosive environment are combined, it is to assess susceptibility to stress-corrosion cracking and hydrogen-related cracking, critical in oil, gas, and pressure applications.
Temperature and humidity cycling that evaluates the environmental durability of materials, coatings, and assemblies.
Chemical exposure methods that rank the localized corrosion resistance of stainless steels and alloys, where general corrosion tests miss the risk.
Corrosion testing is the right call whenever service life in a hostile environment is the question.
Corrosion testing applies wherever metals and coatings face a corrosive or weathering environment.
Materials: Metals & Alloys · Thin Films & Coatings · Battery Materials
Industries: Energy · Aerospace · Automotive · Manufacturing · Metals & Metalworking
Corrosion testing is heavily standardized, and your specification usually names the method. Where an applicable standard exists, testing is aligned to it and cited in your report. We align to the method your specification requires and document it.
| Analysis / Standard | What It Covers |
|---|---|
| Accelerated Aging | Accelerated Aging & Environmental Reliability |
| Igc | Intergranular Corrosion |
| Heat Aging | Accelerated Aging & Environmental Reliability |
| Environmental Stress Cracking | Accelerated Aging & Environmental Reliability |
| HASS | Highly Accelerated Stress Screening |
| VDA 230-219 | Corrosion Testing |
| Accelerated Corrosion | Corrosion Testing |
| ASTM G155 | Complete Guide to Xenon Arc Weathering Test for UV |
| ASTM G154, ASTM D4329, ASTM D4587 | QUV Accelerated Weathering |
| ASTM D7869 | Xenon Arc Exposure Test for Transportation Coatings |
| ASTM B117 | Salt Spray (Fog) Testing |
| MIL-STD-883 | Laser Decapsulation - Making Light Work of Failure Analysis |
| ASTM G85 | Modified Salt Spray Test |
| ASTM D5894 | Cyclic Salt Fog/UV Exposure of Painted Metal |
| ASTM D7574 | Bisphenol A in Environmental Waters by Liquid Chromatography/Tandem Mass |
This depends on the method as well as the exposure your specification calls for. Salt spray runs from 24 hours to well over 1,000 hours, and cyclic and immersion tests run to a defined schedule. Because exposure sets the timeline, we confirm the duration with you and state it in the quote.
It totally relies on the environment and the failure you are guarding against. General ranking often uses salt spray or immersion, localized corrosion uses pitting and crevice methods, and cracking risk uses stress-corrosion tests. Describe the service conditions, and we recommend the method.
Yes. We identify corrosion products and the mechanism, whether pitting, stress-corrosion cracking, or galvanic attack, combining corrosion analysis with microscopy and composition. Preserve the corrosion products and send the part unaltered.
At MatX Lab, corrosion and environmental testing is done through a network of highly accredited partner laboratories, so chamber, electrochemical, and analytical work run as one program. You work with one contact and receive one report. Methods are aligned to ASTM, ISO, IEC, UL, and MIL-STD where a published method applies. MatX Lab is an analysis provider, not a standards body, and issues no certifications. Every engagement can sit under an NDA.
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