ISO 2812-1:2017 pdf free
ISO 2812-1:2017 pdf free.Paints and varnishes一Determination of resistance to liquids
If agreed, compensate for any loss of liquid by adding test liquid, or water conforming to the requirements of grade 3 of ISO 3696 at specified intervals, in order to keep the initial volume or initial concentration constant.
If agreed, the test may be performed at a higher temperature. The vessel and the test liquid shall already be heated to the specified test temperature in a heating cabinet (5.2) before immersing the test piece.
The test temperature shall be maintained with an accuracy of±3 °C (see 5.2). The vessel shall only be removed from the cabinet for a short time in order to immerse the test pieces.
The test duration shall be agreed between the interested parties and should reflect the end use of the coating.
Stand or hang the coated test piece in an approximately vertical position in the vessel. Test panels (see 8.1.1) shall have the 100 mm side horizontal.
Saturate each of the two test liquids with the other immediately before use.
Carefully pour the test liquid having the higher density down the wall of the vessel, until it covers approximately 40 % of the test piece (panel or rod). Make sure that the test piece is not wetted above this level.
Add the second liquid in the same manner, until it covers a further 40 % of the test piece. Cover the vessel and leave it to stand without stirring.
If an intermediate evaluation has been agreed, take the test piece out of the liquid at the appropriate time,remove any remaining liquid from its surface, examine the test piece and re-immerse it in the liquid.
NOTE In case there is a possibility of contamination by the upper liquid of the lower part of the test panels and/or the lower liquid, perform replicate tests for any intermediate assessments.
The test duration shall be agreed between the interested parties and should reflect the end use of the coating.ISO 2812-1 pdf download.
