Architectural curtain walls: why 316L is preferred in coastal environments

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architecture · 316L · coastal · surface finishing

Curtain walls face long-term salt spray and pollution; 316L is more stable than 304. Finish, drainage design and regular cleaning determine actual service life.

Selection and maintenance points for stainless architectural curtain walls:

1) Grade: 304 can work in normal inland environments; coastal, heavily polluted or de-icing salt environments should prefer 316L, with duplex considered where needed.
2) Finish: No.4 brushed, mirror or blasted per design; rougher surfaces collect dirt, so cleanability matters.
3) Detailing: avoid crevices and trapped water; details must drain; isolate dissimilar metals to prevent galvanic corrosion.
4) Fabrication: pickle and passivate after welding to remove heat tint and free iron; clean metal chips after cutting and drilling.
5) Maintenance: regular cleaning in coastal areas (removing salt deposits) significantly extends life.

Common problems:

• Cleaning with carbon steel tools/brushes during installation, causing free iron contamination.
• Untreated weld heat tint becomes the origin of early rust.
• Poor drainage leads to crevice corrosion.

Purchasing and acceptance advice: require pickling/passivation records, blue-dot sampling and protective film/transport protection.

本文由 SteelWe 编辑与行业专家整理，内容仅供行业交流参考，不构成交易或投资建议。引用请注明来源。

Architectural curtain walls: why 316L is preferred in coastal environments

Curtain walls face long-term salt spray and pollution; 316L is more stable than 304. Finish, drainage design and regular cleaning determine actual service life.

Selection and maintenance points for stainless architectural curtain walls:

1) Grade: 304 can work in normal inland environments; coastal, heavily polluted or de-icing salt environments should prefer 316L, with duplex considered where needed.
2) Finish: No.4 brushed, mirror or blasted per design; rougher surfaces collect dirt, so cleanability matters.
3) Detailing: avoid crevices and trapped water; details must drain; isolate dissimilar metals to prevent galvanic corrosion.
4) Fabrication: pickle and passivate after welding to remove heat tint and free iron; clean metal chips after cutting and drilling.
5) Maintenance: regular cleaning in coastal areas (removing salt deposits) significantly extends life.

Common problems:

• Cleaning with carbon steel tools/brushes during installation, causing free iron contamination.
• Untreated weld heat tint becomes the origin of early rust.
• Poor drainage leads to crevice corrosion.

Purchasing and acceptance advice: require pickling/passivation records, blue-dot sampling and protective film/transport protection.

本文由 SteelWe 编辑与行业专家整理，内容仅供行业交流参考，不构成交易或投资建议。引用请注明来源。