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TaoranWang金蟲(chóng) (初入文壇)
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[求助]
合金,擴(kuò)散
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課后習(xí)題,求助:在鋼表面渡上一層Ni來(lái)保護(hù)鋼材不被腐蝕,渡完后在1100度進(jìn)行熱處理,如果Ni含量低于60%便無(wú)法保護(hù)鋼材,試估算最大熱處理時(shí)間,F(xiàn)在有一鋼材被熱處理了最大時(shí)間的一半時(shí)間,如果要讓它保持10年抗腐蝕能力,每年最多可以腐蝕多少毫米? (. A steel component is plated with a monolayer of pure Ni as corrosion inhibitor for room temperature service. After plating the component has to be heat treated at 1100 °C; if the minimum level of protection occurs for a Ni content of 60 %, then estimate the maximum time for which the component can be heat treated. A component is heat treated for half this time, estimate the maximum corrosion rate (mm/year) if the component must retain its corrosion resistance for a minimum of 10 years.) |
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