Asti Nurul Aini, 1117011008 (2015) SINTESIS DAN KARAKTERISASI SERTA UJI AKTIVITAS ANTIKOROSI SENYAWA TURUNAN ORGANOTIMAH(IV)3-AMINOBENZOAT PADA BAJA LUNAK DALAM MEDIUM KOROSIF. FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM, UNIVERSITAS LAMPUNG.
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Abstract
ABSTRACT In this research, the syntheses of diphenyltin(IV) di-3-aminobenzoate as a yellowish-white solid with percentage yield 95.2 %, and triphenyltin(IV) 3-aminobenzoate as reddish-brown solid with percentage yield of 80.85 % were performed. The compounds were mainly characterized by UV, IR, 1H, 13C NMR spectroscopies and based on the microanalytical data that lead to the structure of diphenyltin(IV) di-3-aminobenzoate and triphenyltin(IV) 3-aminobenzoate. The anti-corrosion test with potentiodynamic method indicated that the triphenyltin(IV) 3-aminobenzoate compound has shown to inhibit corrosion better than that of diphenyltin analogues, with percentage inhibition of 50.34 % and 42.88 %, respectively, and with corrosion rate of 6.71 and 7.72 mpy respectively, in the concentration of 100 mg/L. The organotin(IV) aminobenzoates tend to behave predominantly as cathodic inhibitor. The qualitative analysis of mild steel surface using microscope showed that in the presence of diphenyl- and triphenyltin(IV) 3-aminobenzoate was able to inhibit the corrosion rate on steel surface. Keywords : organotin(IV) aminobenzoate, corrosion, potentiostat. ABSTRAK Pada penelitian ini telah dilakukan sintesis senyawa difeniltimah(IV) di-3-aminobenzoat yaitu berupa padatan berwarna putih kekuningan dengan rendemen 95,2 % dan trifeniltimah(IV) 3-aminobenzoat berupa padatan berwarna cokelat kemerahan dengan rendemen 80,85 %. Senyawa-senyawa hasil sintesis telah dikarakterisasi dengan spektroskopi UV, IR, 1H, 13C NMR dan berdasarkan data mikroanalisis yang mengarah pada struktur senyawa difeniltimah(IV) di-3-aminobenzoat dan trifeniltimah(IV) 3-aminobenzoat. Pengujian antikorosi dengan metode potensiodinamik menunjukkan bahwa senyawa trifeniltimah(IV) 3-aminobenzoat memiliki kemampuan menghambat korosi baja lebih tinggi dibandingkan dengan difeniltimah(IV) di-3-aminobenzoat pada konsentrasi yang sama yaitu sebesar 50,34 % dan 42,88 % dengan laju korosi sebesar 6,71 dan 7,72 mpy pada penambahan masing-masing 100 mg/L. Senyawa organotimah(IV) 3-aminobenzoat cenderung mengikuti pola inhibitor katodik. Analisis kualitatif permukaan baja menggunakan mikroskop menunjukkan bahwa senyawa difenil- dan trifeniltimah(IV) 3-aminobenzoat mampu menghambat laju korosi pada permukaan baja. Kata kunci : Organotimah(IV) 3-aminobenzoat, korosi, potensiostat.
| Item Type: | Other |
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| Subjects: | Q Science > QD Chemistry |
| Divisions: | ?? Kimia ?? |
| Depositing User: | 8362010 . Digilib |
| Date Deposited: | 27 Aug 2015 06:49 |
| Last Modified: | 27 Aug 2015 06:49 |
| URI: | http://digilib.unila.ac.id/id/eprint/12346 |
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