本文選題：X管線鋼　切入點：交流電　出處：《金屬學報》2017年05期 　論文類型：期刊論文

【摘要】：通過數(shù)據(jù)采集、電化學測試、浸泡實驗和表面分析技術(shù)研究了交流電對X80鋼在近中性環(huán)境中腐蝕行為的影響。結(jié)果表明,交流電干擾下,隨著交流電密度的增大,交流腐蝕形態(tài)發(fā)生變化,由全面腐蝕轉(zhuǎn)變?yōu)榫植扛g,且試樣表面產(chǎn)生較多的點蝕坑。全波交流電正負半波交替干擾下,X80鋼發(fā)生陰陽極極化,導致Fe的局部溶解和H的析出;負半波交流干擾下會導致析氫而發(fā)生氫致陽極溶解,產(chǎn)生的點蝕坑均較尖銳;正半波干擾下,只發(fā)生陽極溶解,產(chǎn)生的點蝕坑呈現(xiàn)凹形,且比較平滑。不同波形交流干擾下,X80鋼表面產(chǎn)生的腐蝕產(chǎn)物不一致:全波和正半波干擾下,腐蝕產(chǎn)物較疏松且發(fā)生龜裂,無a-FeOOH;負半波交流干擾下,X80鋼表面腐蝕產(chǎn)物較致密,腐蝕產(chǎn)物存在a-FeOOH,對基體具有一定的保護作用。
[Abstract]:The effect of AC on the corrosion behavior of X80 steel in near neutral environment was studied by means of data acquisition, electrochemical test, immersion test and surface analysis. The form of AC corrosion changed from total corrosion to local corrosion, and there were more pitting pits on the surface of the sample. Under the alternating interference of full wave alternating current positive and negative half-wave, the X80 steel produced cathode and anode polarization, which resulted in the partial dissolution of Fe and the precipitation of H; The negative half-wave AC interference will lead to hydrogen evolution and hydrogen induced anodic dissolution, and the pitting pits will be sharp, while under the positive half-wave interference, only anodic dissolution will occur, and the resulting pitting pits will be concave. The corrosion products produced on the surface of X80 steel under different waveforms of AC interference were not consistent: under the interference of full wave and positive half wave, the corrosion products were loose and cracked without a-FeOOH, and the corrosion products on the surface of X80 steel were denser under negative half-wave AC interference. The corrosion product exists a-FeOOH, which has a certain protective effect on the matrix.
【作者單位】： 北京科技大學新材料技術(shù)研究院;航天材料及工藝研究所;中國科學院寧波材料技術(shù)與工程研究所;
【基金】：國家自然科學基金項目Nos.51371036;51131001和51471034~~
【分類號】：TG178
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本文編號：1634620