Corrosion Testing
During the materials selection process for an industrial application, an evaluation of different materials and how they react in a specific operating environment is required. Exposure of materials to simulated corrosion circumstances provides the following analytical data:
- Estimated Service Life/Durability
- Comparison of Candidate Materials
- Performance Expectations in Operating Environments
- Material Suitability to Final Applications
VARCHU MARC LLP operates several pieces of equipment capable of replicating natural environmental and atmospheric conditions involved in cyclic testing; modeling structure, morphology, and relative corrosion resistance.
VARCHU MARC LLP Labs corrosion testing methods provide quality control by ensuring that your component surface protection application processes, such as coatings, anodizing and electroplating are being performed to specification.
Types of Corrosion
Uniform or General Corrosion
The most common type, general corrosion occurs when widespread exposure to weather, chemicals, or other elements causes corrosion across the entirety of an exposed metal surface.
High-Temperature Corrosion
Corrosion is sometimes caused in specific types of metals when there is exposure to corrosive substances at high temperatures.
Local Corrosion
Local corrosion occurs when only a specific area is affected, such as a crevice or hole, however it threatens the integrity of the entire metal surface.
Alloy Corrosion
Corrosive elements target one component of an alloy.
Galvanic Corrosion
Two distinct types of metal come into contact with one another and an electrochemical reaction causes one of the metals to corrode faster.
Environmentally Assisted Cracking (EAC)
Stress-environment interactions cause corrosion, such as stress corrosion cracking, caustic cracking, environmental stress cracking, and other subtypes. Stress, chemical exposure, pressure, vibrations, welding, machining and other factors can cause EAC.
Flow-Assisted Corrosion or Erosion-Corrosion
Corrosion caused by the flow of water or air, exposing fresh metal, which can rapidly degrade components.
Fretting Corrosion
Occurs when surfaces wear down from constant friction caused by vibrations or rubbing.
