材料工程
材料工程
재료공정
JOURNAL OF MATERIALS ENGINEERING
2009年
11期
27-30,35
,共5页
曹国良%李国明%常万顺%陈珊%陈学群
曹國良%李國明%常萬順%陳珊%陳學群
조국량%리국명%상만순%진산%진학군
碳钢%点蚀%夹杂物
碳鋼%點蝕%夾雜物
탄강%점식%협잡물
carbon steel%pitting corrosion%inclusion
选择四种不同脱氧程度的碳钢,在pH=10的3%(质量分数)NaCl溶液中进行极化试验,比较钢的点蚀诱发敏感性;在人造海水中进行模拟闭塞腐蚀电池试验和室内挂片试验,评价钢的点蚀扩展速度.结果表明:沸腾钢A,B钢中的主要夹杂物为橄榄状硫化物和土豆状氧化锰夹杂,镇静钢C,D钢的主要夹杂物为条片状硫化物夹杂和硅酸盐夹杂.在相同条件下,沸腾钢比镇静钢表现出更弱的点蚀诱发敏感性和更小的点蚀扩展速度.同是镇静钢,过低的磷含量可显著促进蚀孔的扩展.
選擇四種不同脫氧程度的碳鋼,在pH=10的3%(質量分數)NaCl溶液中進行極化試驗,比較鋼的點蝕誘髮敏感性;在人造海水中進行模擬閉塞腐蝕電池試驗和室內掛片試驗,評價鋼的點蝕擴展速度.結果錶明:沸騰鋼A,B鋼中的主要夾雜物為橄欖狀硫化物和土豆狀氧化錳夾雜,鎮靜鋼C,D鋼的主要夾雜物為條片狀硫化物夾雜和硅痠鹽夾雜.在相同條件下,沸騰鋼比鎮靜鋼錶現齣更弱的點蝕誘髮敏感性和更小的點蝕擴展速度.同是鎮靜鋼,過低的燐含量可顯著促進蝕孔的擴展.
선택사충불동탈양정도적탄강,재pH=10적3%(질량분수)NaCl용액중진행겁화시험,비교강적점식유발민감성;재인조해수중진행모의폐새부식전지시험화실내괘편시험,평개강적점식확전속도.결과표명:비등강A,B강중적주요협잡물위감람상류화물화토두상양화맹협잡,진정강C,D강적주요협잡물위조편상류화물협잡화규산염협잡.재상동조건하,비등강비진정강표현출경약적점식유발민감성화경소적점식확전속도.동시진정강,과저적린함량가현저촉진식공적확전.
Four carbon steels with different deoxidization degrees had been selected. Pitting suscepti-bility of steel was compared by means of polarization tests in 3% NaCl with pH=10. The ability to propagate of pits was evaluated by occluded corrosion cell and hanging plates. The results showed the main inclusions in steel A and steel B were olivelike sulphide and MnO, while the typical inclusions in steel C and steel D were the strip-like silicate and sulphide inclusions, respectively. Under the same condition, the killed steels exhibited weaker pitting susceptibility and the lower rate of pit propagation than rimmed steels do. Too low content of P in the killed steels helped to the accelerate propagation of pits.