The fishhook eye of tuna long-line using nylon fishing monofilament was always observed to have a violent corrosion phenomenon compared with that of ordinary fishing gear.
Experiments on the sea water immersions and electric potential measurements using various anti-corrosive materials were conducted to evaluate the corrosion mechanism and resistance of the fishhook.
The results showed that the method attaching aluminum to the fishhook was proved to be most effective, even low-priced aluminum was observed to have a preventive effect on corrosion.
This method could reduce labor and expenses due to exchange and re-plating of the fishhook.