Test Method: SATRA TM341

Oxides of nitrogen discolouration test

February 2023

SCOPE

This method is intended to determine the propensity of materials to discolour when in an atmosphere containing oxides of nitrogen (NOx). The method is applicable to all materials; however it is most applicable to white- and light-coloured materials.

PRINCIPLE

A test specimen is placed in an atmosphere containing a known concentration of NOx for a set time at a temperature of 23 ± 3°C. The specimen is then removed from contact with the NOx atmosphere and allowed to desorb before comparing to an unexposed control sample.

REFERENCES

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

HISTORY

First issued November 1992. Revised November 1992, February 2023.

AVAILABILITY

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

PRICE (ex. VAT)

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

• Members: £75
• Non-members: £215

TYPE

• Discolouration

USAGES

• Tests applicable to several material types