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EN-Rev IM/GN-AM-EN/2.9 Copyright © March, 2022. CSI Solar Co., Ltd.
www.csisolar.com
D.2.1: GENERAL ANTI-CORROSION METHODS
Do not
scratch or break the corrosion-resistant coating
on the modules or mounting systems during
installation.
Do not
change the structure of the module, i.e. by
drilling holes into the module frame.
Process specifications for the different components
must comply with relevant international anti-corrosion
standards.
All general requirements listed in the Canadian Solar
standard manual should be applied when installing
“special-anti-corrosion” modules.
D.2.2: SPECIAL ANTI-CORROSION METHODS FOR
MOUNTING
Use mounting components that contain the same
metals or metals with a similar electrochemical
potential. The metal’s coating also should be taken into
account. There may be a big difference between the
electrochemical potentials of two different coating
materials.
If mounting components consist of two metals with a
big difference in electrochemical potential, please add
insulating washers (e.g. bi-metallic washers or
insulation gaskets) to isolate the metals from each
other.
Copper/aluminum bi-metallic washers are commonly
available to prevent electrochemical corrosion. These
washers are made in a process called explosion welding.
Concerning insulation gaskets, mica laminate, or other
silicone or fluoride-based insulating materials are
recommended.
D.2.3: ANTI-CORROSION METHODS FOR GROUNDING DEVICES
Two special anti-corrosion methods for protecting the system’s grounding devices are recommended. Please refer to
the instructions in the table below:
Item
Method A
Method B
Coating
components
Fluorocarbon varnish
(one layer)
Layer 1 (metal side): epoxy zinc rich primer
Layer 2 (middle layer): fluorocarbon finish paint
Layer 3 (air side): fluorocarbon varnish
Coating
thickness
40µm
Layer 1 (metal side): 40µm
Layer 2 (middle layer): 40µm
Layer 3 (air side): 40µm
Painting interval
/
Follow the supplier’s general requirements when painting the three
coating layers. Apply the middle layer 24 hours after painting layer 1.
Paint the air side layer 6 hours later after painting the middle layer.
