Exposure Programme on Atmospheric Corrosion Effects of Acidifying Pollutants in Tropical and Subtropical Climates Johan Tidblad & Vladimir Kucera & Farid Samie & Surendra N. Das & Chalothorn Bhamornsut & Leong Chow Peng & King Lung So & Zhao Dawei & Le Thi Hong Lien & Hans Schollenberger & Chozi V. Lungu & David Simbi Received: 17 June 2005 / Revised: 26 January 2006 / Accepted: 12 February 2006 / Published online: 6 January 2007 # Springer Science + Business Media B.V. 2007 Abstract Many national exposure programmes have been performed in tropical and subtropical climates during the last 50 years. However, ambitious pro- grammes involving more than a few countries are scarce. In this paper a recently formed network of test sites is described involving 12 test sites in Asia (India, Vietnam, Thailand, Malaysia and China including Hong Kong) and four test sites in Africa (South Africa, Zambia and Zimbabwe). This effort is part of the 2001–2004 Swedish International Development Agency (SIDA) funded Programme on Regional Air Pollution in Developing Countries (RAPIDC). Corro- sion attack after one (2002–2003) year of exposure (carbon steel, zinc, copper, limestone and paint coated steel) are presented together with environmental data (SO 2 , NO 2 , HNO 3 ,O 3 , particles, amount and pH of precipitation, temperature and relative humidity) for all the test sites. The obtained corrosion values are substantially higher than expected for limestone, higher than expected for carbon steel and lower than expected for zinc compared to values calculated using the best available dose–response functions. Water Air Soil Pollut: Focus (2007) 7:241–247 DOI 10.1007/s11267-006-9078-6 J. Tidblad (*) : V. Kucera : F. Samie Corrosion and Metals Research Institute, Drottning Kristinas väg 48, 11428 Stockholm, Sweden e-mail: johan.tidblad@kimad.com S. N. Das Regional Research Laboratory, Bhubaneswar, India C. Bhamornsut Thailand Institute of Scientific and Technological Research, Bangkok, Thailand L. C. Peng Malaysian Meteorological Service, Kuala Lumpur, Malaysia K. L. So Hong Kong Environmental Protection Department, Hong Kong, China Z. Dawei Chongqing Institute of Environmental Science and Monitoring, Chongqing, China L. T. H. Lien Institute of Materials Science, Hanoi, Vietnam H. Schollenberger CSIR/Materials and Manufacturing, Johannesburg, South Africa C. V. Lungu University of Zambia, Lusaka, Zambia D. Simbi University of Zimbabwe, Harare, Zimbabwe