Mechanisms of Accelerated Oxidation of Copper in the Presence of Molten Oxides

Abstract

Accelerated oxidation of copper under the influence of a molten corrosion product is reviewed with an emphasis on the Cu-Bi 2 O 3 system. Fast and super-fast stages of the accelerated copper oxidation are considered. Mechanisms of fast and super-fast stages of the accelerated copper oxidation are suggested.

Accelerated Oxidation of V2O5-Deposited Copper

“…Accelerated oxidation of metals and alloys stimulated by forming liquid corrosion products has been discussed in the literature, especially for the corrosion phenomenon known as ''hot corrosion'' [4,5]. Recently, the fluxing and electrochemical mechanisms of accelerated metal oxidation under the influence of liquid corrosion products were developed [6][7][8][9][10][11][12][13][14][15][16]. However, there is not sufficient understanding on whether fluxing or electrochemical mechanism is more important.…”

Microstructure of TiCuO Films on Copper Ion Release and Endothelial Cell Behavior

“…发现钛及钛合金优良的血液相容性是由于其表面生 成的稳定氧化物二氧化钛的作用。黄楠等 [4][5] 研制得 到的氧化钛薄膜具有较好的生物相容性, 可以提高 316L SS 支架的耐腐蚀性、化学惰性和血液相容性。 但氧化钛薄膜还未达到理想的抗凝血要求, 服役期 间病人还需服用抗凝药。 金属 Cu 离子是人体必需的微量元素, 正常人 体中含有约 100~120 mg 的 Cu 元素 [6] 。 人体服用 Cu 的药用浓度高于 5.0 mg/kg 体重时才表现出毒性 [7] , Cu 还是人体生命过程中许多重要酶的活性中心 [8] 。 研究发现, 一定浓度的 Cu 离子可以促进内皮细胞 的 增 殖 , 但 并 不 促 进 平 滑 肌 和 成 纤 维 细 胞 的 增 殖 [9][10] , 还可以通过上调血管内皮生长因子的表达 来促进血管生成和血管成熟 [11] , 因此, 合金材料中 [12] 和抗菌性能 [13][14] 等, 很少有研究关注其内皮细胞相容性, 也较少有 [15] , [23][24] , 同时杂质元素会影响 Cu 的氧 化过程 [25] 。 本研究认为, [26,28,30] [31] , 并且在微摩尔浓度范围内的 Cu 离子可 以促进主动脉内皮细胞的增殖和迁移 [9,[31][32] [34][35] , 具有一定亲疏水平衡的表面最 有利于细胞生长 [36][37]…”

Electrochemical Mechanism of Fast Stage of the Catastrophic Oxidation of Metals

“…Some metals experience accelerated corrosion in the presence of molten oxides (Bi 2 O 3 , V 2 O 5 , MoO 3 , and etc.) at elevated temperature in air [1][2]. This type of attack is called a catastrophic oxidation of metals (COM).…”