?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=MEKANISME+ADSORPSI+INHIBITOR+KOROSI+OLIGOMER%0D%0A4-VINILPIRIDIN+PADA+PERMUKAAN+BAJA+LUNAK%0D%0A%0D%0ADALAM+MEDIUM+KOROSIF+CO2&rft.creator=TB.+SOFI+SUDIRMANO%2C+1617011014&rft.subject=500+ilmu+pengetahuan+alam+dan+matematika&rft.subject=540+Kimia+dan+ilmu+yang+berhubungan&rft.description=%0D%0A%0D%0AOligomer+4-vinilpiridin+yang+digunakan+pada+penelitian+ini+telah+difraksinasi%0D%0Adengan+menggunakan+Sephadex+LH-20+sebagai+fase+diam+dan+metanol+sebagai%0D%0Afase+gerak.+Fraksi-fraksi+oligomer+4-vinilpiridin+diuji+aktivitasnya+menggunakan%0D%0Ametode+Electrochemical+Impedance+Spectroscopy+(EIS)+dengan+konsentrasi%0D%0Abervariasi+(0%2C+25%2C+50%2C+100+dan+150+mg+L-1%0D%0A%0D%0A)+dan+suhu+bervariasi+(30%2C+50+dan+70oC)%0D%0Asebagai+inhibitor+korosi+pada+baja+lunak+dalam+medium+korosif+CO2.+Data+persen%0D%0Aproteksi+EIS+digunakan+untuk+menentukan+mekanisme+adsorpsi+menggunakan%0D%0Aempat+model+adsorpsi%2C+yaitu%3A+Temkin%2C+Langmuir%2C+Frumkin+dan+Flory-Huggins.%0D%0A%0D%0APermukaan+baja+lunak+dianalisis+menggunakan+Scanning+Electron+Microscope-%0D%0AEnergy+Dispersive+X-Ray+Spectroscopy+(SEM-EDS).+Hasil+uji+EIS+menunjukkan%0D%0A%0D%0Afraksi+yang+memiliki+kemampuan+sebagai+inhibitor+korosi+terbaik+pada+suhu+30oC%0D%0Ayaitu+F5%2C+pada+suhu+50+dan+70oC+yaitu+F1.+Hasil+mekanisme+adsorpsi+yang+paling%0D%0Abaik+yaitu+menggunakan+model+Langmuir+dengan+reaksi+berlangsung+secara%0D%0Aspontan%2C+adsorpsi+terjadi+secara+kimia+dan+endotermik%2C+serta+entropi+pada+suhu%0D%0Apaling+tinggi+menunjukkan+adsorpsi+paling+baik.+Hasil+analisis+permukaan%0D%0Amenunjukkan+F1+dan+F2+paling+baik+dalam+memproteksi+baja+lunak.%0D%0A%0D%0AKata+kunci%3A+Baja+lunak%2C+korosi+CO2%2C+inhibitor+korosi%2C+fraksi-fraksi+oligomer+4-%0D%0A%0D%0Avinilpiridin%2C+mekanisme+adsorpsi.%0D%0A%0D%0A%0D%0A%0D%0AThe+4-vinylpyridine+oligomer+used+in+this+study+was+fractionated+using+Sephadex%0D%0ALH-20+as+the+stationary+phase+and+methanol+as+the+mobile+phase.+The+4-%0D%0Avinylpyridine+oligomeric+fractions+were+tested+for+their+activities+using+the%0D%0AElectrochemical+Impedance+Spectroscopy+(EIS)+method+with+varying%0D%0Aconcentrations+(0.+25%2C+50%2C+100+and+150+mg+L-1%0D%0A%0D%0A)+and+varying+temperatures+(30%2C+50%0D%0Aand+70oC)+as+corrosion+inhibitors+on+mild+steel+in+CO2+corrosive+medium.+EIS%0D%0Aprotection+percent+data+was+used+to+determine+the+adsorption+mechanism+using%0D%0Afour+adsorption+models%2C+namely%3A+Temkin%2C+Langmuir%2C+Frumkin+and+Flory-Huggins.%0D%0AMild+steel+surfaces+were+analyzed+using+Scanning+Electron+Microscope-Energy%0D%0ADispersive+X-Ray+Spectroscopy+(SEM-EDS).+The+results+of+the+fractionation%0D%0Aobtained+5+fractions.+The+EIS+test+results+show+the+fraction+that+has+ability+as+the%0D%0Abest+corrosion+inhibitor+at+temperature+of+30oC%2C+namely+F5%2C+at+temperature+of+50%0D%0Aand+70oC%2C+namely+F1.+The+best+result+of+the+adsorption+mechanism+is+using+the%0D%0ALangmuir+model+with+the+reaction+taking+place+spontaneously%2C+adsorption+occurs%0D%0Achemically+and+endothermically%2C+and+the+entropy+at+the+highest+temperature+shows%0D%0Athe+best+adsorption.+The+result+of+surface+analysis+shows+that+F1+and+F2+are+the%0D%0Abest+in+protecting+mild+steel.%0D%0A%0D%0AKata+kunci%3A+Mild+steel%2C+CO2+corrosion%2C+corrosion+inhibitor%2C+4-vinylpyridine%0D%0A%0D%0Aoligomeric+fractions%2C+adsorption+mechanism.&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2021&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F60652%2F1%2FABSTRAK%2520-%2520tubagus%2520sudirmano.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F60652%2F2%2FFULL%2520SKRIPSI%2520TANPA%2520LAMPIRAN%2520-%2520tubagus%2520sudirmano.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F60652%2F3%2FFULL%2520SKRIPSI%2520TANPA%2520PEMBAHSAN%2520DAN%2520LAMPIRAN%2520-%2520tubagus%2520sudirmano.pdf&rft.identifier=++TB.+SOFI+SUDIRMANO%2C+1617011014++(2021)+MEKANISME+ADSORPSI+INHIBITOR+KOROSI+OLIGOMER+4-VINILPIRIDIN+PADA+PERMUKAAN+BAJA+LUNAK+DALAM+MEDIUM+KOROSIF+CO2.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F60652%2F