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潼南金屬制品SSC硫化氫應力腐蝕試驗

信息編號:63937748 發布時間:2025/8/15 10:35:15
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SSC硫化物應力腐蝕(Sulfide Stress CorrosionCracking,SSCC或SSC)是應力腐蝕(SCC)中的一個特殊類型,但與通常所說的應力腐蝕有所區別,在通常所說的應力腐蝕中,環境所起的作用是以陽極溶解為主,而SSC則是以陰極充氫為主。目前SSC機理尚未被完全揭示,但目前大多數學者傾向于這種開裂是由氫導致,并且硫離子或硫化氫對氫向材質內的擴散有一定的促進作用。在石油、天然氣(尤其是天然氣)長輸管道中,高壓高強度管道的硫化物應力腐蝕開裂會引發重大的安全事故,因此需要評價管線鋼的抗SSC性能,保證管道的安全。
SSC硫化物應力腐蝕一般認為有陽極溶解和氫致開裂兩種。裂縫形態則一般有沿晶界發展的晶間型(如黃銅的“季裂”)和貫穿晶粒的穿晶型 (如不銹鋼的堿脆)兩種。
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