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.