?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=ANALISIS+LAJU+KOROSI+BAJA+St37+MENGGUNAKAN+INHIBITOR%0D%0AEKSTRAK+THEOBROMA+CACAO+DENGAN+VARIASI%0D%0AKONSENTRASI+0%25%2C+4%25+dan+8%25+DALAM+MEDIUM%0D%0AKOROSIF+HCl+3%25+PADA+SUHU+100+C&rft.creator=IDAWATI+PANJAITAN%2C+1617041047&rft.subject=530+Fisika&rft.description=ABSTRACT%0D%0A%0D%0ACORROSION+RATE+ANALYSIS+OF+ST37+STEEL+USING+INHIBITOR%0D%0ATHEOBROMA+CACAO+EXTRACT+WITH+VARIATIONS%0D%0A0%25%2C+4%25+and+8%25+CONCENTRATION+IN+MEDIUM%0D%0A3%25+HCL+CORROSION+AT+100+oC%0D%0A%0D%0ABy%0D%0AIdawati+Panjaitan%0D%0A%0D%0AResearch+has+been+carried+out+on+the+analysis+of+the+corrosion+rate+of+St37+steel%0D%0Ausing+the+theobroma+cacao+extract+inhibitor+with+various+concentrations+of+0%25%2C%0D%0A4%25+and+8%25+in+3%25+HCl+corrosive+medium+at+100+oC.+The+effectiveness+of%0D%0Ainhibitors+derived+from+cocoa+leaves+on+the+corrosion+of+St37+steel+in+HCl%0D%0Asolution+has+been+investigated+using+the+weight+loss+method%2C+X-Ray+Diffraction%0D%0A(XRD)%2C+and+Scanning+Electron+Microscopy+(SEM)+equipped+with+Energy%0D%0ADispersive+Spectroscopy+(EDS).+Based+on+the+results+of+research+that+has+been%0D%0Adone%2C+the+higher+the+immersion+temperature%2C+the+greater+the+corrosion+rate+on%0D%0Asteel+without+inhibitors.+The+highest+effectiveness+of+cocoa+theobroma+extract+was%0D%0Afound+at+a+concentration+of+8%25+at+a+temperature+of+100+oC+with+an+efficiency+of%0D%0A88.91%25.+The+results+of+XRD+analysis+after+the+addition+of+the+inhibitor+of%0D%0Atheobroma+cacao+extract+reduced+the+peaks+to+a+pure+Fe+phase.+From+the+three%0D%0Asample+analysis+processes+and+the+calculation+of+the+corrosion+rate%2C+it+was+found%0D%0Athat+the+inhibitor+of+cocoa+leaf+extract+(theobroma+cacao)+was+effective+in%0D%0Ainhibiting+the+corrosion+rate+of+St37+steel.%0D%0AKey+words+%3A+St37+steel%2C+cocoa+leaf+extract%2C+corrosion+inhibitor+and+HCl.%0D%0A%0D%0Aii%0D%0A%0D%0Aii%0D%0AABSTRAK%0D%0A%0D%0AANALISIS+LAJU+KOROSI+BAJA+St37+MENGGUNAKAN+INHIBITOR%0D%0AEKSTRAK+THEOBROMA+CACAO+DENGAN+VARIASI%0D%0AKONSENTRASI+0%25%2C+4%25+dan+8%25+DALAM+MEDIUM%0D%0AKOROSIF+HCL+3%25+PADA+SUHU+100+oC%0D%0A%0D%0AOleh%0D%0A%0D%0AIdawati+Panjaitan%0D%0A%0D%0ATelah+dilakukan+penelitian+tentang+analisis+laju+korosi+baja+St37+menggunakan%0D%0Ainhibitor+ekstrak+theobroma+cacao+dengan+variasi+konsentrasi+0%25%2C+4%25+dan+8%25%0D%0Adalam+medium+korosif+HCl+3%25+pada+suhu+100+oC.+Efektivitas+inhibitor+yang%0D%0Aberasal+dari+daun+kakao+pada+korosi+baja+St37+dalam+larutan+HCl+telah+diteliti%0D%0Amenggunakan+metode+kehilangan+berat%2C+X-Ray+Diffraction+(XRD)%2C+dan+Scanning%0D%0AElektron+Microscopy+(SEM)+yang+dilengkapi+dengan+Energy+Dispersive%0D%0ASpectroscopy+(EDS).+Berdasarkan+hasil+penelitian+yang+telah+dilakukan+semakin%0D%0Atinggi+suhu+perendaman+semakin+besar+laju+korosi+pada+baja+tanpa+inhibitor.%0D%0AEfektivitas+tertinggi+ekstrak+theobroma+kakao+terdapat+pada+konsentrasi+8%25+pada%0D%0Asuhu+100+oC+dengan+efesiensi+88%2C91+%25.+Hasil+analisis+XRD+setelah+penambahan%0D%0Ainhibitor+ekstrak+theobroma+cacao+puncak-puncak+berkurang%2C+menjadi+fasa+Fe%0D%0Amurni.+Dari+ketiga+proses+analisis+sampel+dan+perhitungan+laju+korosi+didapatkan%0D%0Abahwa+inhibitor+ekstrak+daun+cokelat+(theobroma+kakao)+efektif+dalam%0D%0Amenginhibisi+laju+korosi+pada+baja+St37.%0D%0AKata+kunci+%3A+Baja+St37%2C+ekstrak+daun+cokelat%2C+inhibitor+korosi+dan+HCl.&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%2F60607%2F1%2FABSTRAK%2520-%2520idawati%2520panjaitan.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F60607%2F2%2FSKRIPSI%2520FULL%2520-%2520idawati%2520panjaitan.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F60607%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN%2520-%2520idawati%2520panjaitan.pdf&rft.identifier=++IDAWATI+PANJAITAN%2C+1617041047++(2021)+ANALISIS+LAJU+KOROSI+BAJA+St37+MENGGUNAKAN+INHIBITOR+EKSTRAK+THEOBROMA+CACAO+DENGAN+VARIASI+KONSENTRASI+0%25%2C+4%25+dan+8%25+DALAM+MEDIUM+KOROSIF+HCl+3%25+PADA+SUHU+100+C.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F60607%2F