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<span lang="IN">The aims of this research to make</span><span> poly(vinylidene fluoride) (PVDF) and poly(dimetilsiloksan) (PDMS) </span><span lang="IN">composites </span><span>separator with blending membrane method. </span><span lang="IN">Synthesized of<span>  </span></span><span>PVDF/PDMS</span><span lang="IN"> composites separator </span><span lang="IN">used various ratio </span><span>were 10/0, 9/1, 8/2, and 7/3. The purpose of increasing concentration of PDMS</span><span lang="IN">/</span><span>PVDF to improve the performance of the composites separator which includes </span><span lang="IN">a</span><span> dimensions of porosity, </span><span lang="IN">a </span><span>pore density, and </span><span lang="IN">a </span><span>electrical conductivity. Based on crystallographic analysis using XRD, the </span><span lang="IN">increasing</span><span> concentration </span><span lang="IN">number </span><span>of PDMS </span><span lang="IN">to make compositess was influence</span><span> decreas</span><span lang="IN">ing of</span><span> crystallinity </span><span lang="IN">until </span><span>29.26% in </span><span lang="IN">a </span><span>ratio 7/3</span><span lang="IN">.</span><span lang="IN">The analysing of</span><span> FTIR </span><span lang="IN">have sound the wavenumber of each phase can distinguish, which </span><span>this material includes in the criteria </span><span lang="IN">of the </span><span>composites</span><span lang="IN">. The result using XRD and FTIR to material PVDF/PDMS composites in all of the ratio constituens have shown the identification of the structure </span><span>α-</span><span lang="IN">phase of PVDF. The increase of concentration number PDMS influenced decreasing of pore dimension and increasing of pore density </span><span>with the small </span><span lang="IN">of </span><span>pore dimension 1.71 µm and pore density 4.07x10¹¹ count/m²inthe ratio 7/3. In </span><span lang="IN">a</span><span> ratio 7/3, the value of the electrical conductivity w</span><span lang="IN">as </span><span>3.45x10^-4</span><span>S/cm and the resistance </span><span lang="IN">i</span><span>ncrease</span><span lang="IN">d</span><span> up to 80%.</span>

The corrosions process is a natural process and cannot be hindered, but it can be protected by adding a green inhibitor. Green corrosion inhibitors are a new alternative solution for corrosion protection because they are low-cost, biodegradable, and eco-friendly inhibitors. This research was used papaya leaves dan guava leaves extract as organic inhibitor solution by Maceration Method. The concentration of these green inhibitors is 0 mL, 1 mL, 2.5 mL, 3 mL, and 3.5 mL. The type of testing method used in this research is FTIR, PDP, and weight loss. The results show that there is Tanin function groups in papaya leaves and guava leaves extract.  The potentiodynamic polarization shows the value of corrosion rate without inhibitor is 0,418 mm/year. In contrast, the corrosion rate was decreased with improving the green inhibitor as many 3.5 mL. The corrosion rate was decreased until 0,00055 mm/year, and the value of efficiency is 99,868%.