There are a large number of coastal commercial projects in Australia and New Zealand, so anti-corrosion is one of the issues that need to be paid attention to during the long-term use of container cafes.
Especially in areas close to the coast, salt in the air can accelerate metal corrosion. New Zealand's Building CodeHub cited information from BRANZ and pointed out that sea salt in coastal air will significantly increase the corrosion rate of building metal materials. New Zealand's built environment is also divided into different corrosion zones based on marine salt spray and other environmental factors.
For container cafes, it is not just large-area steel plates that need to be inspected, but also:
Steel structure welding positions;
door and window frames and connectors;
Bottom steel structure;
Bolts and fasteners;
Perforation and cutting locations;
Drainage area;
The connection location between different metal materials.
During factory production, cutting and welding will change the protective status of the original metal surface, so these locations require corresponding anti-corrosion treatment.
For coastal projects, appropriate materials, coatings and connections also need to be selected based on the local corrosive environment. Building Performance New Zealand also recommends selecting materials based on the corrosive environment and paying attention to subsequent maintenance requirements.
Therefore, "using galvanized steel" does not mean that the entire cafe does not need anti-corrosion maintenance. Actual durability is also related to material specifications, welding treatments, coating systems, drainage design, site environment and ongoing maintenance.
