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Test Method: SATRA TM310

Atmospheric sulphide tarnishing and salt water corrosion

December 2020


This method is intended to determine the propensity of a metal surface to either change visually due to contamination by atmospheric pollution, or to corrode due to the action of salt water. The method is applicable to all types of metal and metal plated components.


Method 1 - Sulphide tarnishing

A test specimen is stored in a moist atmosphere containing a low concentration of hydrogen sulphide gas for one hour. The specimen is then assessed subjectively for signs of discolouration.

Method 2 - Salt water corrosion

Cotton lawn, saturated with sodium chloride solution, is wrapped around a test specimen. This assembly is then stored in a sealed bag for 24 hours at room temperature. The test specimen is then subjectively assessed for signs of corrosion and the lawn assessed for staining.


This Test Method does not reference any additional Standards or Test Methods.


First issued May 1965. Revised May 1970, December 1980, September 1992, December 2020.


This test method is available to members and non-members.


This price is for a printed copy of the Test Method.

  • Members: £75
  • Non-members: £215



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