PENGARUH INHIBITOR EKSTRAK DAUN INAI (lawsonia inermis) TERHADAP LAJU KOROSI BAJA ST. 37 DIUKUR DENGAN METODE PENGURANGAN MASSA
Â Vol. 4, No. 1
TheÂ corrosionÂ testsÂ andÂ microÂ structureÂ analysisÂ ofÂ St.Â 37Â steelÂ hadÂ beenÂ investigated.Â TheseÂ investigationÂ wereÂ conductedÂ inÂ nitricÂ acidÂ (HNO3).Â TheÂ rangeÂ ofÂ concentrationÂ addedÂ wasÂ fromÂ 0-0.5Â NÂ withÂ extractÂ ofÂ hennaÂ leavesÂ asÂ inhibitors.Â TheÂ methodÂ usedÂ wasÂ losingÂ massÂ byÂ measuringÂ lossÂ massÂ ofÂ steelÂ beforeÂ andÂ afterÂ corrosion.Â TheÂ boilingÂ methodÂ wasÂ usedÂ toÂ getÂ theÂ extractÂ ofÂ hennaÂ leaves.Â OpticalÂ photoÂ CartonÂ StereoÂ TrinokulerÂ wereÂ usedÂ forÂ microÂ structure.Â CorrosionÂ rateÂ canÂ beÂ reducedÂ byÂ addingÂ inhibitorÂ andÂ inhibitionÂ efficiencyÂ isÂ measuredÂ ifÂ itsÂ abilityÂ toÂ suppressÂ corrosion.Â TheÂ resultÂ ofÂ theÂ immersionÂ testsÂ showÂ thatÂ theÂ inhibitionÂ efficienciesÂ areÂ differentÂ onÂ 0-0.5Â NÂ concentrationÂ areÂ 81.96Â %,Â 78.92Â %,Â 53.74Â %,Â 44.85Â %,Â 44.45Â %Â andÂ 39.65Â %.Â AdditionÂ ofÂ 50Â g/1000Â mLÂ extracÂ ofÂ hennaÂ leavesÂ resultsÂ inÂ theÂ highestÂ efficiencyÂ forÂ HNO3Â environment.Â TheÂ photoÂ showedÂ theÂ surfaceÂ structureÂ ofÂ steelÂ beforeÂ corrosion,Â inÂ layerÂ withÂ extractÂ ofÂ hennaÂ leavesÂ andÂ afterÂ corrosionÂ inÂ mediumÂ nitricÂ acid.
Keywords:Â CorrosionÂ rate,Â InhibitionÂ efficiency,Â ExtractÂ ofÂ hennaÂ leaves,Â NitricÂ acid.Â Â Â
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