Corrosion Development Behavior of Patinated Bronze Relics in the Environ-mental Simulation Media

LIN Ying, YAN Ying, WU Xue-wei, WU Si-min, ZHOU Hao, WU Lai-ming, CAI Lan-kun

Surface Technology ›› 2017, Vol. 46 ›› Issue (2) : 46-51.

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Surface Technology ›› 2017, Vol. 46 ›› Issue (2) : 46-51. DOI: 10.16490/j.cnki.issn.1001-3660.2017.02.007
Special Topic—Damage and Protection of Cultural Relics

Corrosion Development Behavior of Patinated Bronze Relics in the Environ-mental Simulation Media

  • LIN Ying1, YAN Ying1, WU Xue-wei1, WU Si-min1, CAI Lan-kun1, ZHOU Hao2, WU Lai-ming2
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Abstract

The work aims to study the corrosion development behavior of patinated bronze in 3 kinds of environment simulated solution. Corrosion features and phenomena of the samples were studied by means of potentiodynamic scanning, SEM-EDS, etc. In simulated atmospheric environmental medium, potential fell within 50~160 mV, the range of anodic polarization. Compared with other three bronze materials, the anode corrosion current density of bronzes covered with CuCl rust was the minimum; in simulated sea water environmental medium, the anode corrosion current density of patinated bronzes were all slightly greater than bare bronze; in simulated SO2 environmental medium, the Rp values of four bronze samples were all greater than that in atmospheric environment. In simulated atmospheric environmental medium, the CuCl patina was protective for bronze substrate at more negative potential; in simulated sea water environmental medium, patinated bronze had no protective effect on the substrate; in simulated SO2 environmental medium, the introduction of SO32? inhibited the corrosion of bronzes. The surface morphology and SEM-EDS analysis results show that, in the simulated SO2 environmental medium, pitting corrosion is present in bare bronze, CuCl patinated bronze and mixed patinated bronze, thus inhibiting the formation of powdery rust.

Key words

patinated bronze; powdery rust; potentiodynamic scanning

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LIN Ying, YAN Ying, WU Xue-wei, WU Si-min, ZHOU Hao, WU Lai-ming, CAI Lan-kun. Corrosion Development Behavior of Patinated Bronze Relics in the Environ-mental Simulation Media[J]. Surface Technology. 2017, 46(2): 46-51

Funding

Supported by Student‘s Plaform for Innovation and Entrepreneurship Trainning Program(x14088) and the Shanghai committee of science and technology research plan(13231203000)
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