Page 126 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

Defective Sulphate dimple
mill-lining material (cross section)

Fig. 3
Scale deposit Consideration and description

At first the judgement of defects is to be performed by naked eye. Often these defects are

(e.g. by scale deposit in the furnace) only blemishes because the enamel layer beneath the
defect is undamaged. Deposits on the pretreated part or deposited during application can

damage the entire layer, whereby the corrosion resistance could be in question.

Test report
In the test report to be mentioned:

Fig. 4 kind and origin of the test piece
Sulphate dimple place and date of testing

description of defects, number and extent
complete state of the test piece.

Fig. 5

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