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 (f) Heat Exchangers and Condensers. Where required, zinc anodes of appropriate style and type
must be installed.
(g) Dissimilar Metals Protection. Zinc anodes of an appropriate style and type should be installed
whenever dissimilar metals (e.g. bilge pump strainers, valves and piping) are immersed in or frequently
flooded with seawater (more than 50 percent of the time). Install anodes near the dissimilar metals
junctions.
(8) Cathodic Protection for Aluminum Hulls. Cathodic protection shall be applied to aluminum hulled
boats and ships in seawater. Sacrificial Zinc Alloy Anodes type ZHC shall be installed unless specific
approval is granted for other systems. Doubler plates will be installed as per Figure 1-1.
CAUTION
Magnesium anodes and mercury bearing aluminum anodes shall not be used on aluminum hulls.
Deviation from this will cause accelerated deterioration of the hull.
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