A new pickling method that reduces the metal oxide on steel strip using H2 has been studied through an extensive campaign of experimental tests. The process, referred to as 'acid free pickling', is environmentally friendly and does not use acid. It is most suitable for application to hot rolled low carbon steel strip. Experimental studies are in progress to validate the application of hydrogen on different metals.
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References
1.
‘Preparation of steel substrates before application of paints and related products – visual assessment of surface cleanliness – Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings’, ISO8501–1, ISO, Geneva, Switzerland, 1988.
