ASTM G85

ASTM G85 is a standard practice for modified salt spray (fog) testing. Micom offers testing to ASTM G85 as part of its corrosion testing solutions. Although ASTM G85  is based on ASTM B117, it offers more aggressive test conditions such as using a test solution with a lower pH, alternating between corrosive and neutral atmosphere or by using an aggressive electrolyte mix.

ASTM G85 contains 5 annexes each consisting of a modification versus the standard ASTM B117 atmosphere.

Annex	Modification
A1	Acetic acid-salt spray test, continuous
A2	Cyclic acidified salt spray test
A3	Seawater acidified test, cyclic (SWAAT)
A4	SO 2 salt spray test, cyclic.
A5	Dilute electrolyte cyclic fog dry test.

Annex A5 is also called up in ASTM D5894 test.

ASTM G85 Typical Experimental Parameters

We will need to confirm the parameters below so that we can run a proper test for you.

Orientation: It is important to note that while undergoing testing in the salt spray cabinet, specimens need to be supported or suspended between 15° and 30° from the vertical and preferably parallel to the principal direction of the flow of fog through the chamber, based upon the dominant surface being tested. Samples need to be supported by their bottom or side.

Additional Information

If you are looking for additional information about corrosion testing, ASMT B117 test or salt spray testing, we invite you to visit the following resources on our website:

• learn more about ASTM B117 test
• learn more about Salt Spray Testing services
• learn more about Coating Testing services

If you have any questions about the aluminum and ferrous alloys tests or corrosion tests in general, we invite you to contact us today. Our material testing specialist will be able to help you and answer your questions about ASTM G85.

Paint, Coating and Polymer Testing Services

We also invite you to download our brochure to learn more about our Paint, Coating and Polymer testing services.