SINTESIS DAN KARAKTERISASI SENYAWA TRIFENILTIMAH(IV) HIDROKSIBENZOAT SEBAGAI INHIBITOR KOROSI PADA BAJA LUNAK DALAM DMSO-HCl

MURNI FITRIA, 1217011040 (2016) SINTESIS DAN KARAKTERISASI SENYAWA TRIFENILTIMAH(IV) HIDROKSIBENZOAT SEBAGAI INHIBITOR KOROSI PADA BAJA LUNAK DALAM DMSO-HCl. UNIVERSITAS LAMPUNG, FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM .

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Abstrak

Telah dilakukan sintesis senyawa trifeniltimah(IV) hidroksibenzoat dengan mereaksikan ligan 2-hidroksi dan 4-hidroksibenzoat dengan trifeniltimah(IV) hidroksida dalam larutan metanol. Persen hasil sintesis senyawa trifeniltimah(IV) 2-hidroksibenzoat dan trifeniltimah(IV) 4-hidroksibenzoat adalah 79,77 dan 89,66%. Senyawa tersebut dikarakterisasi menggunakan teknik spektroskopi infra merah (IR), ultra ungu, dan analisis unsur. Besarnya inhibisi trifeniltimah(IV) 2- hidroksibenzoat dan trifeniltimah(IV) 4-hidroksibenzoat pada korosi baja lunak dalam DMSO-HCl dikaji dengan polarisasi potensiodinamik. Hal tersebut menunjukkan bahwa senyawa trifeniltimah(IV) 2-hidroksibenzoat dan trifeniltimah(IV) 4-hidroksibenzoat merupakan inhibitor korosi yang bagus untuk perlindungan baja lunak. Tingginya efisiensi inhibisi berhubungan dengan efek pengeblokan sederhana melalui adsorpsi molekul inhibitor pada permukaan baja lunak. Nilai persen efisiensi inhibisi (EI) tertinggi senyawa trifeniltimah(IV) 2- hidroksibenzoat adalah 58,52 dan trifeniltimah(IV) 4-hidroksibenzoat adalah 61,72% pada konsentrasi 100 ppm. Kata kunci: trifeniltimah(IV) hidroksibenzoat, potensiodinamik, korosi. abstract The synthesis of triphenyltin(IV) hydroxibenzoates were performed by reacting ligands of 2-hydroxy and 4-hydroxibenzoic acid with triphenyltin(IV) hydroxide in methanol solution. The percentage yiels of the compounds synthesized triphenyltin(IV) 2-hydroxibenzoate and triphenyltin(IV) 4-hydroxibenzoate were 79,77 and 89,66%, respectively. These compounds were well characterized by spectroscopy techniques of infra red (IR), ultraviolet (UV), as well as based on microelemental analyzer. The inhibition activity of triphenyltin(IV) 2- hydroxibenzoate and triphenyltin(IV) 4-hydroxibenzoate on mild steel corrosion in DMSO-HCl were studied with potentiodynamic polarization method. The results showed that the triphenyltin(IV) 2-hydroxibenzoate and triphenyltin(IV) 4- hydroxibenzoate act as good corrosion inhibitors for mild steel protection. The high inhibition efficiency were attributed to the simple blocking effect by adsorption of inhibitor molecules on the steel surface. The high percentage efficiency inhibition (EI) values for the triphenyltin(IV) 2-hydroxibenzoate was 58,52 and triphenyltin(IV) 4-hydroxibenzoate was 61,72% at concentration of 100 ppm. Keywords: triphenyltin(IV) hydroxibenzoate, potentiodynamic, corrosion.

Tipe Karya Ilmiah: Skripsi
Subyek: Q Science (General) > Q Science (General)
Program Studi: Fakultas MIPA > Prodi Kimia
Depositing User: 54487912 . Digilib
Date Deposited: 10 May 2016 06:24
Last Modified: 10 May 2016 06:24
URI: http://digilib.unila.ac.id/id/eprint/22231

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