Three Types of Linear Potential Sweep

Linear potential sweep is a potentiostatic technique, in the sense that the potential is the externally controlled parameter. The potential is changed at a constant rate 

Linear potential sweep measurements are generally of three types  

When the sweep rate is very low, in the range of v = (0.1—5) mVs , measurement is conducted under quasi-steady-state conditions. The sweep rate plays no role in this case, except that it must be slow enough to ensure that the reaction is effectively at steady state along the course of the sweep. This type of measurement is widely used in corrosion and passivation studies, as we shall see, and also in the study of some fuel cell reactions in stirred solutions. Reversing the direction of the sweep should have no effect on the current-potential relationship, if the sweep is slow enough. Deviations occur sometimes as a result of slow formation and/or reduction of surface oxides or passive layers. Because the sweep rate is slow, the potential is often swept only in one direction, and the experiment is then referred to as linear sweep voltammetry (LSV). 

Physical Electrochemistry Fundamentals, Techniques and Applications. Eliezer Gileadi Copyright 2011 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 978-3-527-31970-1 

2) Studies of oxidation or reduction of species in the btdk of the solution 

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