Four Assessment Dimensions for Stainless Steel Selection in Chemical Plants

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化工 · 选型 · 腐蚀

Medium, concentration, temperature, flow rate—start from operating conditions rather than from grade designation.

Material selection in chemical plants starts with four dimensions:

1) Medium: whether it is an oxidizing acid, reducing acid, chlorine-containing, or fluorine-containing.
2) Concentration: dilute sulfuric acid and concentrated sulfuric acid have completely different material requirements.
3) Temperature: as temperature rises, the risk of pitting corrosion and stress corrosion cracking increases.
4) Flow rate: high flow rates cause erosion-corrosion, while low flow rates tend to cause deposition and crevice corrosion.

Common progression: 304 → 316L → 2205 → 904L/6Mo → nickel-based alloys. Each step up significantly increases cost, so corrosion testing should be performed or operating data from similar plants should be referenced.

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。

Four Assessment Dimensions for Stainless Steel Selection in Chemical Plants

Medium, concentration, temperature, flow rate—start from operating conditions rather than from grade designation.

Material selection in chemical plants starts with four dimensions:

1) Medium: whether it is an oxidizing acid, reducing acid, chlorine-containing, or fluorine-containing.
2) Concentration: dilute sulfuric acid and concentrated sulfuric acid have completely different material requirements.
3) Temperature: as temperature rises, the risk of pitting corrosion and stress corrosion cracking increases.
4) Flow rate: high flow rates cause erosion-corrosion, while low flow rates tend to cause deposition and crevice corrosion.

Common progression: 304 → 316L → 2205 → 904L/6Mo → nickel-based alloys. Each step up significantly increases cost, so corrosion testing should be performed or operating data from similar plants should be referenced.

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。