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Conductivity measurement
Steel abrasive may cause chlorides and sulfates contamination during surface preparation prior to coating that may lead to corrosion under coating in harsh environmental conditions. That is why contamination and conductivity measurements may be required on shot and grit for abrasive blasting.
Mechanical testing of shot and grit
The principle of shot and grit mechanical testing in abrasive blasting is that a sample of abrasive is subjected to repeated impacts on a target: the percentage of breakdown is determined by means of a screen analysis.
Operating mix
The Operating Mix is the mixture of recyclable abrasive particles used for blasting. It is characterized by its size distribution.
SAE standard for size specification in abrasive blasting
SAE J444-1993/05 standard provides "Cast shot and grit size specifications for peening and cleaning"
Steel abrasive characteristics
Steel abrasives (high carbon, low carbon, cut wire) are characterised by more than only shape, size and hardness when used in abrasive blasting. Their quality, which influences quality, efficiency and cost of the blasting operation, has to be evaluated through several parameters.
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