Science and technology

Outdoor PV power stations are exposed to alternating sun exposure, temperature difference and wind rain, causing fastener loosening, gasket failure, thread seizure and stress fracture due to thermal expansion and contraction. This article analyzes the stress principle of PV bracket thermal deformation, sorts matching fastener schemes for aluminum alloy, galvanized steel and stainless steel bracket

Mass SUS304 & SUS316 stainless bolts are used for PV projects. Two delivery states are pickled & passivated or raw without passivation. Non-passivated stainless steel easily generates surface flash rust under coastal salt mist environment. This article compares salt mist performance of pickling passivation, non-passivation and stainless coating solutions, establishes bolt selection standards for i

Zn-Al-Mg PV brackets matched with stainless steel bolts easily generate potential difference galvanic corrosion. EPDM EPDM and PTFE polytetrafluoroethylene are two mainstream insulating gasket materials. This article compares weather resistance, temperature resistance, anti-aging and insulation performance of two gasket types via table, formulates thickness selection standards for inland, riversid

After 3-5 years operation of coastal & tidal flat PV stations, stainless steel bolts rust together with carbon steel brackets, seized threads cannot be disassembled and bring extremely high maintenance cost for bracket replacement. This article analyzes thread seizure corrosion mechanism, compares applicable scenarios of four on-site disassembly tools via table, standardizes full disassembly, rust

PV power stations are divided into four corrosion levels: inland, riverside, coastal and offshore. SUS304, SUS316 and 2205 duplex steel fasteners have distinct chloride resistance gaps. This article compares salt spray, mechanical performance and cost parameters via table, provides standardized matching plans for bolts, nuts and gaskets to solve later-stage rust and thread seizure maintenance trou

Analyze galvanic corrosion mechanism caused by potential difference between Zn-Al-Mg carbon steel brackets and SUS304/SUS316/2205 stainless fasteners. Classify four corrosion grades for inland, riverside, coastal and offshore PV projects. Define applicable scope of three protection schemes: insulating gaskets, isolation sleeves and barrier coating. Standardize gasket thickness, assembly sequence a

Classify three corrosion grades for inland, riverside and offshore PV projects. Compare weather resistance parameters of SUS304, SUS316L, 2205 duplex steel and Zn-Al-Mg coated fasteners. Define minimum salt spray hours for coastal projects in accordance with GB/T 10125, and provide dissimilar metal isolation schemes to cut maintenance rust replacement cost.

Aiming at dissimilar metal assembly working conditions of carbon steel beams and stainless steel bolts for coastal PV brackets, analyze accelerated rusting mechanism of galvanic corrosion. Formulate three prevention schemes including insulating gasket, anode protection and coating matching based on GB/T15927. Compare weather resistance parameters of FRP, nylon and EPDM insulating gaskets, sort out

According to outdoor PV working conditions, this guide covers applicable scenarios of SUS304/SUS316 stainless steel, Dacromet carbon steel and insulated nylon fasteners, including salt spray standards, anti-galling solutions, torque values and power station maintenance tips.

Fully standardize full-set fixture, load parameters and judgment criteria for artificial seawater immersion, alternating salt spray and accelerated chloride ion aging test of M12-M20 2507 duplex steel bolts for offshore PV, distinguish two test gradients for inland onshore and coastal offshore projects. Summarize three typical failure sections under seawater corrosion and provide optimization plan