Coatings, cathodic protection and material selection control corrosion.
Control by material selection, design (avoid crevices, drainage), coatings (paint, galvanising, plating), inhibitors, cathodic protection (sacrificial anodes or impressed current), anodising and environment control. Maintenance and inspection extend life.
Ship hulls use paint plus zinc anodes to resist seawater.
Corrosion control combines material choice, coatings and electrical protection, which keeps structures in service for decades.
Coatings, cathodic protection and material selection control corrosion.
Corrosion control combines material choice, coatings and electrical protection, which keeps structures in service for decades.
A method where the metal is made the cathode of an electrochemical cell, either by sacrificial anodes or by impressed current, which prevents corrosion.
It coats steel with zinc, which protects the steel by barrier action and sacrificially corrodes first if the coating is damaged.
Typical applications include galvanising steel beams for a bridge, fitting sacrificial anodes to a ship hull and painting a steel frame with a multi-layer coating system.
Study "Galvanic and pitting corrosion" first (topic 30 of 100 in Materials & Chemical). It covers the groundwork this topic builds on.
Zinc sacrificial anode. Coating systems. Passivation.
Ship hulls use paint plus zinc anodes to resist seawater.
The next topic is "Oxidation and high temperature degradation", which builds directly on this one.
It is classed as Beginner in Materials & Chemical (topic 31 of 100). It is an entry-level topic. It relies only on basic school mathematics and the ideas introduced earlier in this discipline.
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