ABSTRACT

This paper describes the concept of a historical, anticorrosive paint type (armour paint), used on outdoors located ferrous substrates from the early to the mid-20th century. Synthesis from the archive and research reports findings conceptualises a 2 + 2 paint layer system. The system involves red lead linseed oil primer and a top drying oil paint pigmented with micaceous iron oxide and metallic aluminium pigments. This results in excellent barrier properties, high density and elastic paint layers. If moisture reaches the metal and paint interface, the primer acts inhibitive and passivating on the corrosion reactions. The photooxidative deterioration of the paint binder is retarded by the pigment’s ability to reflect light, which affects the lifetime of the paint system. Today, this paint concept is almost forgotten, but associated knowledge of the paint types, paint manufacturing and craft skills could contribute to a sustainable maintenance of ferrous heritage. The authentic concept is, despite its use of a red lead primer, relevant for objects with unique heritage values. The top paints could prolong the lifetime of objects already painted with red lead. A modified concept could initiate development of environmentally beneficial alternatives with VOC-free renewable binders, complex phosphate primers and zinc oxide addition.

摘要

本文介绍了一种历史悠久的防腐涂料类型（装甲涂料）的概念，用于 20 世纪初至中期的户外铁质基材。档案和研究报告结果的综合概念化了 2 + 2 油漆层系统。该系统包括红铅亚麻籽油底漆和用云母氧化铁和金属铝颜料着色的顶干油涂料。这导致出色的阻隔性能、高密度和弹性漆层。如果水分到达金属和油漆界面，底漆会抑制和钝化腐蚀反应。颜料反射光的能力延缓了油漆粘合剂的光氧化变质，这会影响油漆系统的使用寿命。今天，这个油漆概念几乎被遗忘了，但有关油漆类型、油漆制造和工艺技能的相关知识可能有助于对黑色金属遗产的可持续维护。尽管使用了红铅底漆，但真正的概念与具有独特遗产价值的物品相关。顶部涂料可以延长已经涂有红铅的物体的使用寿命。修改后的概念可以启动对环境有益的替代品的开发，其中包括不含 VOC 的可再生粘合剂、复合磷酸盐底漆和添加氧化锌。