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Cox Engineering

A technical information resource for yacht owners

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Heating and refrigeration
Brass & Bronze
Electro chem
Hardness testing
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Information about the metals commonly used in yacht construction, how and where to use them and ways in which they fail.


The tabs are organised alphabetically as follows:


Brass and Bronze. The principal differences between copper alloys and problems that affect them in yacht duties. This page includes information and examples of dezincification of seacocks and other fittings.


Corrosion. Describes general and galvanic corrosion problems.


Crevice. A form of corrosion that affects alloys relying on a passive oxide film for corrosion resistance. The main ones are stainless steels and aluminium alloys.


Electro.  Particular problems that occur when electric currents are applied to metals. Also includes use of anodes and what happens when they are mis-used.


Fatigue. Information and examples of this mechanical failure mechanism that principally affects rigging and its fittings but cannot be ignored anywhere that cyclic stress exists.


Hardness testingA simple means of comparing the hardness of a Rocna anchor shank with a known standard


SCC. Describes the causes of stress-corrosion cracking and shows some examples