Coastal tidal flats and floating 'fish-PV' arrays sit long-term in salt spray, high humidity and wet-dry cycles where ordinary carbon-steel fasteners corrode very fast and become the weak link of plant life.
Chloride attack drives pitting and stress-corrosion cracking; float connectors on water arrays must balance strength and corrosion resistance; the owner required no fastener replacement across the 25-year life.
FASTKING supplied SUS316 austenitic stainless fasteners (bolt, nut, washer); molybdenum lifts pitting resistance, and key joints used a stainless-plus-hot-dip-galvanized hybrid. The full range passed a 2000-hour neutral salt spray test and was specified to the C5-M marine corrosion class.
Coastal and floating arrays kept structural integrity and clean appearance in salt spray, with no fastener replacement in the design life, cutting the safety and cost risk of offshore O&M.
SUS316 stainless bolt, stainless lock nut, stainless washer, HDG hybrid part.