Which mechanism caused increased hull deformation in early 18th-century warships after adopting internal iron bracing?

💡 Explanation

When iron bracing was introduced, galvanic corrosion occurred because iron is anodic to many fastening metals like copper. This electrochemical reaction corroded the fasteners, weakening the structure. Therefore, hull deformation increased, rather than hygrothermal stress or creep which require different material properties or operating conditions.

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