Blast Cleaning and Other Heavy Surface Pretreatments

In broad terms, pretreatment of a metal surface is done for two reasons to remove unwanted matter and to give the steel a rough surface profile before it is painted. Unwanted matter is anything on the surface to be painted except the metal itself and — in the case of repainting — tightly adhering old paint. 

Before any pretreatment is performed, the surface should be washed with an alkali surfactant and rinsed with clean water to remove oils and greases that may have accumulated. Regardless of which pretreatment is used, testing for chlorides (and indeed for all contaminants) is essential after pretreatment and before application of the new paint. 

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Blast-cleaning and other heavy surface pretreatments Abrasive blasting and heavy-metal contamination Weathering and aging of paint... 

A Blast Cleaning and Other Heavy Surface Pretreatments... 

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