A New Strategy for Corrosion Inhibition Coatings for Lead Heritage Metal Objects

作者：Flexer Victoria^*; Grayburn Rosie; de Keersmaecker Michel; Mohammed Elbeshary A A; Dowsett Mark G; Adriaens Annemie

来源：Electrochimica Acta, 2015, 179: 441-451.

DOI：10.1016/j.electacta.2015.05.022

• Lead
• Cultural heritage
• Corrosion resistance
• Lead Carboxylate
• Coating

Corrosion is the major problem in the degradation of heritage metal objects. The development of appropriate treatment methods to stabilize and protect artefacts is a undeniable scientific challenge. Here we propose a new coating method to protect lead heritage metal objects. This coating is environmentally safe, stable, reversible, easy to apply and to remove, and aesthetically justified. The coating consists of a compact and thick layer of lead ditetradecanoate, which is formed upon immersion of a lead substrate in a melted sample of tetradecanoic acid at 60 degrees C. Coated lead samples were exposed either to an aqueous corrosive environment or to a closed chamber with high relative humidity and an oak corrosive atmosphere. The corrosion resistance of the coating was followed for 60 days by electrochemical impedance spectroscopy and X-ray diffraction. Results show an unprecedented corrosion inhibition of the new coatings.

• 出版日期2015-10-10