Microbiologically　influenced　corrosion　(MIC),　also　known　as　biocorrosion,　is　caused　by　corrosive　biofilms.　MIC　is　a　growing　problem,　especially　in　the　oil　and　gas　industry.　Among　various　corrosive　microbes,　sulfate　reducing　bacteria　(SRB)　are　often　the　leading　culprit.　Biofilm　mitigation　is　the　key　to　MIC　mitigation.　Biocide　applications　against　biofilms　promote　resistance　over　time.　Thus,　it　is　imperative　to　develop　new　biodegradable　and　cost-effective　biocides　for　large-scale　field　applications.　Using　the　corrosive　Desulfovibrio　vulgaris　(an　SRB)　biofilm　as　a　model　biofilm,　this　work　demonstrated　that　a　cocktail　of　glyceryl　trinitrate　(GTN)　and　caprylic　acid　(CA)　was　very　effective　for　biofilm　prevention　and　mitigation　of　established　biofilms　on　C1018　carbon　steel　coupons.　The　most　probable　number　sessile　cell　count　data　and　confocal　laser　scanning　microscope　biofilm　images　proved　that　the　biocide　cocktail　of　25　ppm　(w/w)　GTN　+　0.1　%　(w/w)　CA　successfully　prevented　the　D.　vulgaris　biofilm　establishment　on　C1018　carbon　steel　coupons　while　100　ppm　GTN　+　0.1　%　CA　effectively　mitigated　preestablished　D.　vulgaris　biofilms　on　C1018　carbon　steel　coupons.　In　both　cases,　the　cocktails　were　able　to　reduce　the　sessile　cell　count　from　10(6)　cells/cm(2)　to　an　undetectable　level.