Methods of pitting corrosion evaluation

The article describes methods for measuring the depth of pitting corrosion attack. Comparison of digital microscopy and common metallography on sample crossection is made

Corrosion behaviour of hot dip zinc coatings in soil

Paper gives some results of corrosion test of zinc coating in soil in the ČR in comparison with contemporary published data. There is given also case study of hot dip zinc coating´s corrosion on specific bridge object

ICP materials trends in corrosion, soiling and air pollution (1987-2014)

Results from the international cooperative programme on effects on materials including historic and cultural monuments are presented from the period 1987-2014 and include pollution data (SO, NO, O, HNO and PM), corrosion data (carbon steel, weathering steel, zinc, copper, aluminium and limestone) and data on the soiling of modern glass for nineteen industrial, urban and rural test sites in Europe. Both one-year and four-year corrosion data are presented. Corrosion and pollution have decreased significantly and a shift in the magnitude is generally observed around 1997: from a sharp decrease to a more modest decrease or to a constant level without any decrease. SO levels, carbon steel and copper corrosion have decreased even after 1997, which is more pronounced in urban areas, while corrosion of the other materials shows no decrease after 1997, when looking at one-year values. When looking at four-year values, however, there is a significant decrease after 1997 for zinc, which is not evident when looking at the one-year values. This paper also presents results on corrosion kinetics by comparison of one- and four-year values. For carbon steel and copper, kinetics is relatively independent of sites while other materials, especially zinc, show substantial variation in kinetics for the first four years, which needs to be considered when producing new and possibly improved models for corrosion.The evaluation was based on data that were collected by members of the Task Force and organisations, including supporting organisations of the official UNECE ICP Materials network. These organisations are presented under the heading Acknowledgement at the ICP Materials web page.Peer Reviewe