Solar PV stations operate in open‑air conditions. Coastal salt spray, mountain rainfall and large day‑night temperature differences continuously erode mounting fasteners. Anti‑corrosion performance of solar bolts, nuts and washers determines the whole‑system service life.
Inland solar farms: hot‑dip galvanized carbon steel and 304 stainless steel are mainstream. For coastal salt‑spray and chemical‑zone projects, 2205 duplex stainless steel is widely adopted to resist chloride‑ion corrosion and cut maintenance replacement cost.
Dacromet, mechanical galvanizing and zinc‑aluminum coating are popular in solar industry. Compared with ordinary electro‑galvanizing, they achieve much longer salt‑spray hours to match 25+‑year design lifetime of PV systems.
Tracker mounting systems and BIPV projects require large numbers of special‑size bolts, clamping screws and combined gaskets. Fastener manufacturers carry out drawing‑based development and batch verification.
PV projects require strict salt‑spray test reports, mechanical test certificates and material certificates. Export orders need full documentation complying with ASTM and ISO specifications.
SolarFastener supplies complete solar mounting hardware. We offer material suggestion for inland, coastal and high‑corrosion sites, covering standard parts and drawing custom fasteners.