Preparation and use method of bonding composite board section corrosion test working electrode
A working electrode, corrosion test technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of reduced market competitiveness of bonded composite boards, preparation of electrochemical working electrodes, difficulties in market promotion, etc.
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[0031] A method for preparing a working electrode for cross-section corrosion testing of a bonded composite board, which specifically includes the following steps:
[0032] The thickness of the base layer of the selected bonding composite board is at least 0.5 mm, the multiple layer is at least 0.25 mm, and the thickness of the middle adhesive layer is 0.03 mm to 0.01 mm.
[0033] Step (1). First, cut the bonded composite board 0 into strip samples by wire cutting; the strip samples are longer than 15mm in length and 5mm to 10mm in height.
[0034] Step (2). Cut and grind the two ends of the strip sample into symmetrical arc ends; the arc radius of the arc end is less than or equal to 7.5mm, and the edges are polished with 600 mesh sandpaper.
[0035] Step (3). Place the sample with the arc end in the middle of the metal foil barrel container of the same height, and the arc end is in contact with the inner wall of the metal foil barrel container, and the upper and lower sides of the sa...
Embodiment 1
[0042] Select an aluminum alloy bonded composite board with a total thickness of 0.9mm, the substrate is an aluminum plate, the thickness is 0.45mm, the adhesive thickness is 0.05mm, and the stainless steel panel is 0.4mm; cut along the section into a rectangular parallelepiped with a height of 5mm and a length of 15mm. Make the surface 15mm long and 0.9mm wide as the cross-section corrosion test surface; ground the sample surface of 5mm high and 1.5mm thick into an electrode sample with a radius of 7.5mm. After epoxy resin encapsulation, the working surface is ground to 1200 Mesh, the opposite surface is polished to 400 mesh.
[0043] In the process of use, the working surface of the 1200 mesh surface of the working electrode 0 is only close to the outside of the glass tube 7 with an outer diameter of 5 mm, and the conductive voltage clamping block 6 is used to press the working electrode 400 mesh side so that the working electrode 0 is close to On the outside of the glass tube ...
Embodiment 2
[0046] Select a stainless steel bonded composite board with a total thickness of 1.5mm, the base plate is a galvanized sheet, the thickness is 1.2mm, the adhesive thickness is 0.05mm, and the stainless steel panel is 0.25mm; cut along the section into a rectangular parallelepiped with a height of 5mm and a length of 15mm , Make the surface 15mm long and 1.5mm wide as the cross-section corrosion test surface; ground the surface of the 5mm high and 1.5mm thick sample into an electrode sample with a radius of 7.5mm. After epoxy resin encapsulation, the working surface is ground to 1200 mesh, the opposite surface is polished to 400 mesh.
[0047] In the process of use, the working surface of the 1200 mesh surface of the working electrode 0 is only close to the outside of the glass tube 7 with an outer diameter of 5 mm, and the conductive voltage clamping block 6 is used to press the working electrode 400 mesh side so that the working electrode 0 is close to On the outside of the glas...
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