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建筑幕墙 · 316L · 沿海 · 表面处理

建筑幕墙不锈钢:沿海环境为什么更推荐 316L

幕墙长期暴露在盐雾与污染中,316L 比 304 更稳;表面处理、排水设计与定期清洗决定实际寿命。
建筑幕墙用不锈钢的选材与维护要点:
1) 牌号:内陆一般环境 304 可用;沿海、高污染或除冰盐环境优先 316L,必要时评估双相钢; 2) 表面:No.4 拉丝、镜面或喷砂按设计选择;粗糙表面易积尘,需考虑自清洁与清洗便利; 3) 结构:避免缝隙与积水,节点设计要能排水;不同金属接触需绝缘隔离,防止电偶腐蚀; 4) 加工:焊接后必须酸洗钝化,去除氧化色与游离铁;切割、钻孔后清理铁屑; 5) 维护:沿海地区定期清洗(去除盐雾沉积),可显著延长寿命。
常见问题:
• 安装阶段用碳钢工具/钢丝刷清理,造成游离铁污染; • 焊接氧化色未处理,成为早期锈点源头; • 排水不畅导致缝隙腐蚀。
采购与验收建议:要求酸洗钝化记录、蓝点试验抽检、表面保护膜与运输保护。
Compiled by SteelWe editors and industry experts. For industry exchange only; not trading or investment advice. Cite the source when quoting.
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