?url_ver=Z39.88-2004&rft_id=1417041018&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=EFEKTIVITAS+EKSTRAK+DAUN+JAMBU+BIJI+(Psidium+Guajava+L)+%0D%0ASEBAGAI+INHIBITOR+PADA+BAJA+KARBON+St37+%0D%0ADALAM+MEDIUM+KOROSIF+NaCl+3+%25%0D%0A&rft.creator=DIAN+MARDINA+%2C+1417041018&rft.subject=QC+Physics&rft.description=Penelitian+ini+bertujuan+untuk+mengetahui+efektivitas+ekstrak+daun+jambu+biji+(Psidium+Guajava+l+)+sebagai+inhibitor+pada+baja+St37+dalam+medium+korosif+NaCl+3+%25.+Secara+spesifik+tujuan+penelitian+ini+yaitu+mengetahui+pengaruh+penambahan+konsentrasi+inhibitor+ekstrak+daun+jambu+biji+terhadap+laju+korosi.+Untuk+mengetahui+laju+korosi+yang+dihasilkan+dilakukan+metode+pengurangan+berat.+Untuk+mengetahui+struktur+morfologi+dan+produk-produk+korosi+yang+dihasilkan+dilakukan+analisis+SEM+dan+EDS.+Hasil+penelitian+menunjukkan+bahwa+ekstrak+daun+jambu+biji+efektif+menghambat+korosi+pada+konsentrasi+7+%25+dengan+waktu+perendaman+8+hari+yaitu+sebesar+70%2C12+%25.+Berdasarkan+hasil+analisis+SEM+dan+EDS+dengan+adanya+penambahan+inhibitor+luas+permukaan+sampel+yang+terkorosi+berkurang%2C+serta+pengurangan+kadar+FeO+dalam+sampel+lebih+sedikit.+Dari+hasil+analisis+dan+perhitungan+laju+korosi+didapatkan+bahwa+inhibitor+ekstrak+daun+jambu+biji+(Psidium+Guajava+L)+efektif+dalam+menginhibisi+laju+korosi+pada+baja+St37.%0D%0A%0D%0AKata+kunci.+korosi%2C+St37%2C+ekstrak+daun+jambu+biji%2C+laju+korosi%2C+morfologi.%0D%0A%0D%0A%0D%0AABSTRACT%0D%0A%0D%0AThis+research+aims+to+determine+the+effectiveness+of+guava+leaf+extract+(psidium+guajava+l)+as++inhibitor+on+st37+steel+in+corrosive+medium+NaCl+3+%25.+Specifically%2C+the+purpose+of+this+research+is+to+know+the+effect+of+the+addition+of+inhibitor+concentration+of+guava+leaf+extract+to+the+corrosion+rate.+To+find+out+the+corrosion+rate+resulted+by+weight+reduction+method.+To+find+out+the+structure+of+morphology+and+corrosion+products+produced+by+SEM+and+EDS+analysis.+The+results+showed+that+guava+leaf+extract+effectively+inhibited+corrosion+at+7+%25+concentration+with+8+days+immersion+time+of+70.12+%25.+Based+on+the+results+of+SEM+and+EDS+analysis+with+the+addition+of+inhibitor+the+surface+area+of+the+corroded+sample+is+reduced%2C+and+the+reduction+of+FeO+content+in+the+sample+is+less.+From+the+analysis+and+calculation+of+corrosion+rate%2C+it+was+found+that+guava+leaf+extract+inhibitor+(Psidium+Guajava+L)+was+effective+in+inhibiting+corrosion+rate+on+St37+steel.%0D%0AKey+words.+corrosion%2C+St37%2C+guava+leaf+extract%2C+corrosion++rate%2C+morphology.%0D%0A%0D%0A%0D%0A&rft.publisher=Fakultas+Matematika+dan+Ilmu+Pengetahuan+Alam&rft.date=2018-07-30&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F32725%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F32725%2F2%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F32725%2F3%2FSKRIPSI%2520FULL.pdf&rft.identifier=++DIAN+MARDINA+%2C+1417041018++(2018)+EFEKTIVITAS+EKSTRAK+DAUN+JAMBU+BIJI+(Psidium+Guajava+L)+SEBAGAI+INHIBITOR+PADA+BAJA+KARBON+St37+DALAM+MEDIUM+KOROSIF+NaCl+3+%25.++Fakultas+Matematika+dan+Ilmu+Pengetahuan+Alam%2C+Universitas+Lampung.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F32725%2F