Hot Dip Galvanized Steel for Solar Mounting: Algeria Project Case Study for Harsh Climates

As Algeria's utility and distributed PV sectors expand rapidly, matching galvanized steel specifications to local site conditions has become critical for delivering 25+ year project service life. Backed by 10 years of specialized experience in hot-dip galvanized steel production, Shandong Pinjie New Materials has tracked regional solar deployment closely. This case study breaks down material selection for a top Algerian renewable energy EPC's dual-site utility PV portfolio, offering actionable reference for solar projects across North Africa's harsh climate zones.

The EPC developed two distinct project types simultaneously, each with unique environmental stressors that directly impact structural steel durability.

Inland desert sites host ground-mounted solar system deployments, where structural components face daily temperature swings of 30–40°C, frequent sandstorms, and sustained wind speeds up to 120km/h. Along coastal cities, solar panel mounting system installations deal with constant salt spray and elevated ambient humidity, both of which accelerate electrochemical corrosion on exposed steel surfaces. Generic solar racking system specifications fail to address these divergent conditions, leading to premature coating degradation and higher lifecycle costs.

Temperature performance was one of the first screening criteria for the project's material selection process. Daytime surface temperatures in Algeria's inland deserts regularly rise above 55°C, then drop sharply after sunset. This repeated thermal expansion and contraction causes many organic coatings to crack or delaminate over time, ruling out several alternative coating options during early performance testing.

High temperature resistant solar racking designs built on hot-dip galvanized steel avoid this failure mode entirely. The metallurgical bond between zinc and steel remains stable across an extremely wide temperature range, and coating properties stay consistent within the thickness and composition requirements defined in ASTM A123 and ISO 1461 under typical desert operating conditions. This thermal stability eliminates the risk of coating delamination caused by cyclic temperature stress.

Beyond thermal stability, the zinc-iron alloy layers formed during the galvanizing process register harder than the base steel itself, which improves resistance to abrasion from wind-blown sand - a key performance requirement for desert sites. For buried foundation sections, published field data from similar arid-region projects shows galvanized steel has 3–6 times lower average corrosion rates than uncoated steel, reducing long-term maintenance and replacement costs over the full project lifecycle. For coastal sites, hot-dip galvanized steel provides inherent barrier protection against salt-induced corrosion; when paired with controlled coating uniformity and optimized zinc layer thickness, it delivers reliable performance in high-humidity, salt-spray environments.

Our full range of hot dip galvanized solar mounting products supports graded coating specifications tailored to coastal, desert, and mixed climate solar projects across North Africa.

The project team adjusted material specifications separately for each site, rather than applying a single one-size-fits-all standard across both locations. This tiered approach delivers targeted durability without adding unnecessary upfront cost.

Table 1. Standard vs. Algeria-Optimized Galvanized Steel Solar Mounting Specifications

For the PV mounting structure at inland desert sites, the specification uses Q355B high-strength low-alloy steel base material with an average zinc coating of 75–85μm, paired with reinforced profile dimensions to support the 120km/h local wind loads. For coastal sites, coating formulation and uniformity controls are tightened to deliver an 85–100μm zinc layer, enhancing salt corrosion resistance to meet the 25+ year design service life target. The optimized profile geometry also supports modular fabrication, which cuts downstream processing and on-site installation time by roughly 20%.

This tiered approach to material selection is becoming more common across the region, as generic solar racking system specifications no longer deliver reliable performance across the full range of North African site conditions.

Matching coating thickness and base material grade to actual local climate and soil conditions delivers better long-term value, without adding unnecessary upfront cost. For EPC teams, verifying consistent coating thickness, stable base material mechanical properties, and traceable production quality control are all critical steps when evaluating material suppliers.

With 10 years of focus on galvanized steel for solar structural applications, Shandong Pinjie New Materials produces graded coating specifications to suit different environmental conditions. We work directly with project teams to align material parameters with specific site data, and our production controls are fully aligned with the relevant testing and performance requirements of international industry standards.

For EPC teams and developers working on Algerian or North African solar projects, our technical team can provide site-specific material grading solutions and third-party coating test reports. Request a customized material specification sheet or contact our project support team to align your material selection with local climate conditions.

As solar deployment continues to accelerate across North Africa, we will keep refining our product formulations to help clients build more durable, cost-effective solar infrastructure.