Urban outdoor furniture in saline-alkali areas faces accelerated degradation due to high chloride and sulfate concentrations. Key connections requiring reinforced corrosion protection include welding joints between metal components, fastener systems (bolts, screws, rivets), moving parts in hinged mechanisms, electrical grounding points on smart furniture, and material transition zones where different metals meet.
The welding seams particularly demand high-performance anti-corrosion treatments as residual stresses from welding create micro-fissures that trap corrosive salts. Implementing post-weld treatments like shot peening followed by zinc-rich epoxy primers significantly enhances durability. For fasteners, replacing standard carbon steel with duplex stainless steel or titanium alternatives prevents galvanic corrosion.
Moving mechanical joints require special attention through grease-filled stainless steel bearings or polymer bushings that create physical barriers against salt intrusion. At material transition points, dielectric insulation membranes must be installed to prevent electrochemical reactions between dissimilar metals.
Advanced protection methodologies include multi-layer coating systems combining hot-dip galvanization with fluoropolymer topcoats, cathodic protection for buried components, and periodic maintenance protocols using pH-neutral cleaning agents. Material selection should prioritize aluminum alloys (5052, 6061), marine-grade stainless steels (316L), and UV-stabilized polymers with low moisture absorption rates.
Design modifications such as minimizing crevices, ensuring drainage pathways, and elevating furniture above ground level substantially reduce salt accumulation. Regular inspection cycles focusing on these critical connection points enable proactive maintenance before structural integrity becomes compromised.