Annex A
Inspection of thickness
A.2 Equipment
A.2.1 Magnetic, electromagnetic or ultrasonic measuring instrument, with ± 10 % reading accuracy,
calibrated for the range of coating thickness being measured.
Annex B
Holiday detection test
B.2 Equipment
B.2.1 Holiday detector, adjustable, high-voltage, with ± 10 % reading accuracy, equipped with a sound
and/or light signal.
B.2.2 Scanning electrode, in the form of a metal brush, coiled spring with continuous spirals or conductive rubber conforming to the shape of the joints.
B.2.3 Conductors, connecting the joint to an earth electrode.
Annex C
Adhesion test — Resistance to removal
C.2 Equipment
C.2.1 Utility knife, e.g. with a stiff, straight blade.
C.2.2 Steel rule, if required.
C.2.3 Steel rod, if required.
Annex D
Peel-strength test
D.1.2 Equipment
D.1.2.1 Tensile testing machine, capable of recording the peel force with ± 5 % reading accuracy, that
operates at a rate of pull of 10 mm/min ± 1 mm/min, as shown in Figure D.1 for small diameters or as in
Figure D.2 for large diameters.
D.1.2.2 Cutting tool, e.g. knife.
D.1.2.3 Equipment, as suggested in Figures D.1 or D.2.
Annex E
Thermal analysis of epoxy powder and cured coating film (FBE)
E.2 Equipment
E.2.1 Differential scanning calorimeter (DSC), with cooling accessory.
E.2.2 Balance, accurate to 0,1 mg.
E.2.3 Sample-encapsulating press.
E.2.4 Aluminium pans, with covers.
E.2.5 N2 gas supply, dry, analytical grade.
Annex F
Cathodic disbondment test
F.2 Equipment
F.2.1 Electrical source, consisting of a controlled voltage d.c. power unit capable of supplying 20 mA to
each test area simultaneously.
Except when otherwise specified, a cathodic polarization potential of −1500 mV to a saturated calomel
reference electrode (equivalent to UH equal to −1260 mV where UH is the potential of the standard hydrogen
electrode) shall be maintained. The potentials are defined as follows:
⎯ “E” is the potential of the “working electrode” with regard to the “reference electrode”.
⎯ “V” is the difference of potential between the “working electrode” and the “auxiliary electrode”.
F.2.2 Electrolytic cell, having a typical test-cell configuration as shown in Figure F.1 for large-diameter
components and as in Figures F.2 and F.3 for small-diameter components.
The electrolytic cell shall comprise of
⎯ a rigid plastic pipe with an internal diameter of minimum 50 mm. The height shall be such that the total
volume of the electrolyte is equal to or greater than 150 cm3 with a minimum height of the electrolyte of
70 mm;
⎯ a rigid plastic cover in which holes shall be drilled to allow the passage of the electrodes and any other
measuring instruments deemed necessary, and to allow the escape of hydrogen.
F.2.3 Electrodes
F.2.3.1 Reference electrode, capable of giving a suitable potential (see F.2.1) and suitable for the test
temperature required, placed in an electrode holder situated in a glass pipe with a porous end diaphragm.
The end of this assembly shall be placed approximately 10 mm from the surface of the coating and
approximately 20 mm from the coating defect.
F.2.3.2 Auxiliary electrode (anode), consisting of an inert material, e.g. platinum wire, 0,8 mm to 1,0 mm
in diameter.
It shall be immersed in the electrolyte to within approximately 10 mm over the coating defect.
The ratio of the surface area of the anode to that of the cathode shall be greater than 1.
F.2.3.3 Working electrode (cathode), represented by the artificial defect, 6 mm in diameter, with a
maximum depth of 0,5 mm in the steel substrate (see Figure F.4).
F.2.4 Electrolyte, consisting of a 3 % solution of NaCl in distilled or deionized water.
The solution shall be made from analar grade sodium chloride. The pH at 23 °C ± 2 °C during the test shall be in the range of 6 to 9.
The height of the electrolyte in the cell shall be 75 mm ± 5 mm.
F.2.5 Heating equipment, suitable to establish and to maintain the test temperature of the sample.
If not heated in an oven, the temperature shall be checked on the artificial defect by an appropriate means, e.g. a temperature sensor.
Annex G
Impact test
G.2 Equipment
Drop weight testing machine, consisting of the following:
⎯ straight guide made of steel, aluminium or plastic, rigid and non-deformable, with an inside diameter
between 40 mm and 60 mm, length at least 1,30 m and incorporating a smooth and even inside surface;
⎯ support and levelling device (for example, two spirit levels for the horizontal plane and a plumb-line for the vertical plane);
⎯ graduated rod, to determine the drop height to an accuracy of 5 mm;
⎯ hard steel punch, with a hemispherical head, free from notches, porosity or other surface irregularities
and with a diameter of 25 mm (A small metal rod with a diameter of 6 mm shall be fixed perpendicular to
the flat face of the head and in its centre; this rod shall be long enough to hold the additional weights
required for the tests. The punch shall be equipped with a system for raising it to the required height; the
mass of this assembly shall be 1 ± 0,005 kg.);
⎯ number of weights, formed of metal discs (preferably made of stainless steel) with an outside diameter of approximately 24 mm and incorporating a central hole of diameter 6,5 mm. The mass of each disc shall
have an accuracy of ± 5 g.
Other guides may be used by agreement’
Annex H
Indentation test
H.2 Equipment
H.2.1 Chamber or bath, thermostatically controlled to ± 2°C;
H.2.2 Penetrometer, comprised of
⎯ a cylindrical indenter on the top of which is mounted a weight; the assembly, indenter plus weight, shall
produce a pressure in accordance with Table H.1;
⎯ dial gauge or any other measurement system, accurate to ± 0,01 mm.
Annex I
Hot-water immersion test
I.2 Equipment
I.2.1 Oven, controllable to within 3 °C.
I.2.2 Holiday detector.
I.2.3 Cylinder, plastic, 150 mm long, with an interior diameter of 75 mm ± 3 mm.
I.2.4 Knife, pointed, sharp.
I.2.5 Adhesive, elastomeric, e.g. silicone sealant.
I.2.6 Hacksaw blade, small, “Junior” type or similar.