發(fā)布時間：2019-03-08 13:52

【摘要】：運(yùn)用化學(xué)浸泡法和塔菲爾(Tafel)極化曲線外推法研究了00Ni18Co12Mo5Ti馬氏體時效鋼經(jīng)硝酸和氫硫酸兩種不同鈍化處理后在Cl-介質(zhì)中的腐蝕行為,對比分析了00Ni18Co12Mo5Ti鋼與不銹鋼和低合金鋼在FeCl_3溶液中的腐蝕速率,并觀察了腐蝕后的表面形貌。結(jié)果表明:00Ni18Co12Mo5Ti鋼在兩種不同鈍化處理后的腐蝕速率穩(wěn)定,硝酸鈍化后其腐蝕速率是不銹鋼的9倍,是低合金鋼的40%;氫硫酸浸泡后其腐蝕速度稍低于不銹鋼,是低合金鋼的20%。掃描電鏡結(jié)果顯示,00Ni18Co12Mo5Ti鋼的腐蝕類型為微觀點(diǎn)蝕。
[Abstract]:The corrosion behavior of 00Ni18Co12Mo5Ti maraging steel treated with nitric acid and hydrogen sulphuric acid after passivation in Cl- medium was studied by chemical immersion method and Tafel (Tafel) polarization curve extrapolation method. The corrosion rates of 00Ni18Co12Mo5Ti steel, stainless steel and low alloy steel in FeCl_3 solution were compared and analyzed, and the surface morphology after corrosion was observed. The results show that the corrosion rate of 00Ni18Co12Mo5Ti steel is stable after two different passivation treatments. The corrosion rate of 00Ni18Co12Mo5Ti steel after nitric acid passivation is 9 times that of stainless steel and 40% of that of low alloy steel. After soaking in H _ 2SO _ 4, the corrosion rate is slightly lower than that of stainless steel, which is 20% of that of low alloy steel. SEM results show that the corrosion type of 00Ni18Co12Mo5Ti steel is micro-viewpoint corrosion.
【作者單位】： 揚(yáng)州大學(xué)機(jī)械工程學(xué)院;江蘇省特檢院揚(yáng)州分院;
【分類號】：TG142.1
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本文編號：2436869