000			02941nam a22003017a 4500
003			OSt
005			20241105140345.0
008			241105b |||||||| |||| 00| 0 eng d
040			_aTUPM _bEnglish _cTUPM _dTUPM _erda
050			_aBTH RB 37 _bM36 2023
100			_aMangsat, Aubrey Janine V. _eauthor
245			_aUtilization of ethanol extract of chayote ( Sechium edule) peels for corrosion inhibition on iron nails/ _cAubrey Janine V. Mangsat, Sheryl Mae A. Masamoc, Grace B. Piliotas, and Onisifura P. Reyes .--
260			_aManila: _bTechnological University of the Philippines, _c2023.
300			_aviii, 106pages: _c29cm. _e+1 CD-ROM (4 3/4in.)
336			_2rdacontent
337			_2rdamedia
338			_2rdacarrier
500			_aThesis (undergraduate)
502			_aCollege of Science .-- _bBachelor of Applied Science in Laboratory Technology: _cTechnological University of the Philippines, _d2023.
504			_aIncludes bibliography.
520			_aMetal corrosion is caused by the oxidation of atoms on the surface, resulting in irreparable damage to the metal constructions at startling expenses. This encourages the development of an alternative corrosion inhibitor that is cost-effective and environmentally friendly, including chayote peels. Chayote peels were extracted in three methods: (1) dried leaves with ethanol, addition of HCl, then reflux, (2) soaking of dried leaves with ethanol and HCl, then reflux, (3) soaking of dried leaves with HCl and water, then reflux. The extracts obtained following the three methods were phytochemically screened, and the results showed that they contain tannins, flavonoids, terpenoids, saponins, alkaloids, and glycosides. Among the three methods, extract from method 2 possessed more active phytochemicals containing -OH, C-H, C=C, and C-O based on the FTIR analysis. Results also showed that it has the greatest inhibition efficiency of 98.79%. Evaluation using Gas Chromatography-Mass spectroscopy revealed that extract produced by method 2 contains 13 major compounds, including fatty acid ester, the most abundant compound. Ferroxyl indicator test was done, and the result portrayed that corrosion is inhibited in nails soaked in chayote peel extract. For surface examination under light microscope, iron nails soaked in acidic solution without extracts have rough surface while iron nails soaked in acidic solution with extract have smooth surface, this confirms that the chayote peel extract inhibits corrosion on iron’s surface. Nails soaked in 5% extract showed no significant amount of corrosion even after 9 days. Results revealed that the extract from chayote peel is an effective corrosion inhibitor.
650			_aEthanol extraction
650			_aChayote peels
700			_aMasamoc, Sheryl Mae A. _eauthor
700			_aPiliotas, Grace B. _eauthor
700			_aOnisifura, Reyes P. _eauthor
942			_2lcc _cBTH COS _n0
999			_c29018 _d29018