Abstract： AS 3894.1:2002 pdf download.Site testing of protective coatings Method 1: Non-conductive coatings—Continuity testing—High voltage ('brush') method. For routine purposes. and depending upon the item to he tested, the electrode or probe s...
AS 3894.1:2002 pdf download.Site testing of protective coatings Method 1: Non-conductive coatings—Continuity testing—High voltage ('brush') method.
For routine purposes. and depending upon the item to he tested, the electrode or probe shall be in the form of one of the
following:
(a) Brush-type electrode Consisting of a continuous, multi-stranded linear brush (see Note) of design such that, when passed over
the test surface in the recommended manner, the bristle density and the stiffness of the fibre will ensure that the electrode
provides an unbroken sweep over the test area, that is, all points of the surface in the path of the brush will be electrically
swept. The length of wire bristle shall be appropriate to the brush flexibility, so that the lip of the bristle maintains Intimate contact with the test coating during normal passage of the brush.
(b) Rolling. brush or coil spring electrode Having dimensions that permit it to fit closely over the test item, so that the
electrode makes and maintains electrical contact and traverses all points on the coating surface. The spring shall be so designed
that, when in service, each individual coil is in intimate contact with adjacent coils.
(c) Conductive strip Of carbon-impregnated rubber, or flexible plastics.
Recommended：
