Lighting electrical Ready Board Box in rural coastal areas of Africa with high salt spray environments should have galvanized steel plates resistant to neutral salt spray (NSS) corrosion for no less than 240 hours to ensure reliable outdoor operation for 5-10 years. 1、 According to environmental and standard standards, coastal rural areas in Africa have high salt spray concentrations and high humidity, making them highly corrosive environments. Implement ISO 9227 neutral salt spray standard: 5% NaCl solution pH6.5–7.2、 Continuous spray at 35 ℃. The core judgment is that there is no red rust or white rust area less than 5% after 240 hours. 2、 Galvanizing process and coating requirements, hot-dip galvanizing (priority): coating thickness ≥ 80 μ m, salt spray ≥ 240 hours; High quality can last for over 500 hours. Electrogalvanizing+sealing: coating ≥ 15 μ m, color passivation+sealing, salt spray ≥ 120 hours (optional only). It is strictly prohibited to use electric galvanizing to impersonate hot-dip galvanizing, in order to avoid early corrosion and failure. 3、 Suggestions for different environmental levels, for ordinary inland rural areas: ≥ 96 hours (hot-dip galvanizing 65 μ m). Coastal/salt spray rural areas: ≥ 240 hours (hot-dip galvanized 80 μ m+sealed). Extreme coastal areas: ≥ 500 hours (thick zinc layer+heavy anti-corrosion coating). 4、 Practical points: The box board should be ≥ 1.5mm, and the welds and cuts should be fully coated or treated with anti-corrosion. The bolts and accessories are hot-dip galvanized of the same material to prevent galvanic corrosion. Factory attached third-party salt spray report to ensure compliance.