碳鋼焊縫在混凝土孔隙液中的優(yōu)先腐蝕行為與亞硝酸鹽緩蝕劑作用效果
發(fā)布時(shí)間:2019-04-18 23:04
【摘要】:通過(guò)8通道耦合陣列多電極系統(tǒng)以及腐蝕試片的浸泡實(shí)驗(yàn)研究了碳鋼焊縫在模擬混凝土孔隙液中的腐蝕行為以及亞硝酸鹽緩蝕劑的作用效果。通過(guò)測(cè)量開(kāi)路電位、耦合電位以及電偶電流觀測(cè)焊縫區(qū)域(Weld metal)、熱影響區(qū)域(Heat affected zone)與母材區(qū)域(Base metal)之間的電偶腐蝕以及亞硝酸鹽緩蝕劑對(duì)焊縫部位的作用效果。耦合陣列多電極系統(tǒng)以及腐蝕試片的浸泡實(shí)驗(yàn)結(jié)果共同表明,在含有Cl-的模擬混凝土孔隙液中,Q235的WM及其附近區(qū)域會(huì)發(fā)生優(yōu)先腐蝕。同時(shí),亞硝酸鹽緩蝕劑能夠明顯減小不同區(qū)域之間的電偶電流,從而減小焊縫處的局部腐蝕風(fēng)險(xiǎn)。
[Abstract]:The corrosion behavior of carbon steel weld in simulated concrete pore solution and the effect of nitrite corrosion inhibitor were studied by 8-channel coupling array multi-electrode system and immersion experiment of corrosion specimens. By measuring the open circuit potential, coupling potential and galvanic current, the galvanic corrosion between (Weld metal), heat affected zone (Heat affected zone) and base metal region (Base metal) in weld seam and the effect of nitrite inhibitor on weld seam were observed. The results of coupled array multi-electrode system and immersion test of corrosion specimens show that the WM of Q235 and its adjacent areas will be first corroded in the simulated concrete pore solution containing Cl-. At the same time, the nitrite corrosion inhibitor can obviously reduce the galvanic current between different regions, thus reducing the local corrosion risk at the weld.
【作者單位】: 大連理工大學(xué)船舶工程學(xué)院;大連理工大學(xué)物理與光電學(xué)院;
【基金】:十三五國(guó)家科技支撐計(jì)劃項(xiàng)目(2016ZX05057006) 中央高;究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(DUT15YQ36;DUT15TD36)
【分類號(hào)】:TG172.2
本文編號(hào):2460369
[Abstract]:The corrosion behavior of carbon steel weld in simulated concrete pore solution and the effect of nitrite corrosion inhibitor were studied by 8-channel coupling array multi-electrode system and immersion experiment of corrosion specimens. By measuring the open circuit potential, coupling potential and galvanic current, the galvanic corrosion between (Weld metal), heat affected zone (Heat affected zone) and base metal region (Base metal) in weld seam and the effect of nitrite inhibitor on weld seam were observed. The results of coupled array multi-electrode system and immersion test of corrosion specimens show that the WM of Q235 and its adjacent areas will be first corroded in the simulated concrete pore solution containing Cl-. At the same time, the nitrite corrosion inhibitor can obviously reduce the galvanic current between different regions, thus reducing the local corrosion risk at the weld.
【作者單位】: 大連理工大學(xué)船舶工程學(xué)院;大連理工大學(xué)物理與光電學(xué)院;
【基金】:十三五國(guó)家科技支撐計(jì)劃項(xiàng)目(2016ZX05057006) 中央高;究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(DUT15YQ36;DUT15TD36)
【分類號(hào)】:TG172.2
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