Corrosion Testing

Materials Technology

Associates, Inc.

Corrosion Testing

Corrosion Testing

While many corrosion tests are carried out using traditional immersion and weight loss techniques, the staff at MTA specialize in the use of electrochemical techniques to study corrosion problems, and to evaluate the corrosion resistance of a wide range of materials from carbon steel and stainless steel to titanium and tantalum.

Corrosion tests are carried out in accordance with ASTM or SEMI standards, or can be modified to study specific problems.

Standard tests include:
G-31		Laboratory Immersion Corrosion Testing of Metals

G-48		Pitting and Crevice Corrosion Testing of Stainless Steels in Ferric Chloride

G-59		Potentiodynamic Polarization Resistance

G-150 or SEMI F77		Electrochemical Critical Pitting Temperature Testing of Stainless Steels (see example below)
ASTM F2129		Standard Test Method to Determine Corrosion Susceptibility of Small Implant Devices

Electrochemical Cell for Corrosion Testing of Plate Materials

In the ASTM G-150, or SEMI F77 test, the solution temperature is increased from O C at a degree a minute until pitting occurs. When the corrosion current density reaches 100 micro-amps/cm2 the test is stopped, and the temperature noted. In this test of 316 stainless steel the CPT was 20 C.

G-31

G-48

G-59

G-150 or SEMI F77

ASTM F2129

G-150
or
SEMI F77