Design

Fasteners, nuts and bolts used with galvanised steel should be galvanised or sheradised. Mild steel or other metals are likely to accelerate the cathodic-protection demands on the main galvanised surfaces adjacent to the fixings and to cause premature corrosion in those areas

Care must be taken to protect non-ferrous metals from the effects of alkali attack. Alkali is found in materials such as concrete cement and lime. Water run-off from these materials also promotes corrosion and surface deterioration.