This project will study the impact of higher shear rates, the impact of crude oil blending on corrosivity, and study on the interaction of various types of nap acids and sulphur compunds and their impact on corrosivity. A newly designed autoclave, requiring smaller volumes of sample, will allow reduced residence times and minimal opportunity for carboxylic acid degradation. Additional work will be done on the scales produced on the test coupons surfaces, and the utility of various speciation techniques for napthenic acids and the metal scales is being explored.