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Contributor
Corrosion of the enclosure plates – right hand side .
Macro-image – sample A location 2 , 3x magnification .
The microstructure of the copper tubing was consistent with copper ; however , inconsistent grain sizes indicate that improper heat input may have been present during the fabrication / joining process . RACA
“ From visual inspection , it was evident that the entire heat exchanger was subject to corrosive attack .”
Corrosion of copper pipes at welded components .
Corrosion of the enclosure plates – left hand side .
within the environment in which it was operating . It was also noted that the quality of the joints in the copper tubing was inconsistent . The copper tubes were confirmed to have corroded prior to the epoxy putty repair , with sections of the paint layer not providing sufficient corrosion protection .
Microstructural image – sample A location 1 , 50x magnification .
Microstructural image – sample A location 1 , 100x magnification .
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Macro-image – sample A location 2 , 2x magnification .
RACA Journal I March 2024
Continued in April 2024 of RACA Journal .
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