Both Solarization and Sabattier Effects are techniques used in photography. The difference is the amount of exposure that the photos undergo. Solarization effect produces photos that are fully exposed therefore creating blac and white photos, while the sabattier effect produces photos that are partially exposed creating different varying tones (i.e. sepia)
The Sabattier effect is a darkroom technique to create surreal images. Similar to Sabattier effect, except it is specific to situation where the film is massively overexposed. The same process and technique is used for both.