BAB 44.1. Data PengamatanTabel . Pengamatan Visual Objek PraktikumLarutanAwalSetelah 8 Hari

NaCl

HCl

Air Kran

Tabel.. Data Pengukuran Potensial Logam dan Sel (V/CSE), Luas, dan Berat Logam

LarutanLogamE0 logam (V/CSE)Luas (cm2)E0 sel (V/CSE)Berat (gram)

AwalAkhirAwalAkhir

NaClFe-0.3696.84-0.986-0.722-10.3310.25

Zn-1.0237.81.661.6

Fe-0.4047.22-0.893-0.73310.5410.45

Cu-0.0999.611.5811.53

HCLFe-0.5067.2-0.506-0.53710.5110.21

Zn-0.61571.531.33

Fe-0.5139.24-0.478-0.34810.149.85

Cu-0.2747.410.2110.16

Air kranFe-0.3057.6-0.568-0.7410.3210.24

Zn-0.3138.191.051

Fe-0.3617.4-0.066-0.19510.4110.31

Cu-0.0478.148.788.75

4.2. Hasil Pengolahan DataKonversi satuan E logam dan E sel (V/CSE menjadi V/SCE)

Tabel . Data Pengukuran Potensial Logam dan Sel (V/SCE), Luas, dan Berat LogamLarutanLogamE0 logam (V/SCE)Luas (cm2)E0 sel (V/SCE)Berat (gram)

AwalAkhirAwalAkhir

NaClFe-0.2926.84-0.909

-0.645

10.3310.25

Zn-0.9467.81.661.60

Fe-0.3277.22-0.816

-0.656

10.5410.45

Cu-0.0229.611.5811.53

HCLFe-0.4297.2-0.429

-0.46

10.5110.21

Zn-0.53871.531.33

Fe-0.4369.24-0.401

-0.271

10.149.85

Cu-0.1977.410.2110.16

Air kranFe-0.2287.6-0.491

-0.663

10.3210.24

Zn-0.2368.191.051

Fe-0.2847.40.011

-0.118

10.4110.31

Cu0.038.148.788.75

Menghitung laju korosi masing masing logamr = keterangan:r = laju korosi (mpy)m = massa logam yang hilang (gr)A = luas permukaan logam (cm2)t= waktu (jam) = densitas logam (gr/cm3)

LarutanLogamA (cm2)m (gr) (gr/cm3)Waktu (jam)laju korosi (mpy)

NaClFe6.840.087.91924.195 x 10-07

Zn7.80.067.141923.052 x 10-07

Fe7.220.097.91924.471 x 10-07

Cu9.60.058.91921.658 x 10-07

HCLFe7.20.37.91921.494 x 10-06

Zn70.27.141921.134 x 10-06

Fe9.240.297.91921.126 x 10-06

Cu7.40.058.91922.151 x 10-07

Air kranFe7.60.087.91923.775 x 10-07

Zn8.190.057.141922.423 x 10-07

Fe7.40.17.91924.847 x 10-07

Cu8.140.038.91921.173 x 10-07

LAMPIRAN

Konversi satuan E logam dan E sel (V/CSE menjadi V/SCE)

E0 logam (V/SCE)

NaClFe= -0.369 + (0.318-0.241)= -0.292 V/SCE

Zn= -1.023 + (0.318-0.241)= -0.946 V/SCE

Fe= -0.404 + (0.318-0.241)= -0.327 V/SCE

Cu= -0.099 + (0.318-0.241)= -0.022 V/SCE

HCLFe= -0.506 + (0.318-0.241)= -0.429 V/SCE

Zn= -0.615 + (0.318-0.241)= -0.538 V/SCE

Fe= -0.513 + (0.318-0.241)= -0.436 V/SCE

Cu= -0.274 + (0.318-0.241)= -0.197 V/SCE

Air kranFe= -0.305 + (0.318-0.241)= -0.228 V/SCE

Zn= -0.313 + (0.318-0.241)= -0.236 V/SCE

Fe= -0.361 + (0.318-0.241)= -0.284 V/SCE

Cu= -0.047 + (0.318-0.241)= 0.03 V/SCE

E0 sel awal (V/SCE)

NaClFe Zn= -0.986 + (0.318-0.241)= -0.909 (V/SCE)

Fe Cu= -0.893 + (0.318-0.241)= -0.816 (V/SCE)

HClFe Zn= -0.506 + (0.318-0.241)= -0.429 (V/SCE)

Fe Cu= -0.478 + (0.318-0.241)= -0.401 (V/SCE)

Air KranFe Zn= -0.568 + (0.318-0.241)= -0.491 (V/SCE)

Fe Cu= -0.066 + (0.318-0.241)= 0.011 (V/SCE)

E0 sel akhir (V/SCE)

NaClFe Zn= -0.722 + (0.318-0.241)= -0.645 (V/SCE)

Fe Cu= -0.733 + (0.318-0.241)= -0.656 (V/SCE)

HClFe Zn= -0.537 + (0.318-0.241)= -0.46 (V/SCE)

Fe Cu= -0.348 + (0.318-0.241)= -0.271 (V/SCE)

Air KranFe Zn= -0.74 + (0.318-0.241)= -0.663 (V/SCE)

Fe Cu= -0.195 + (0.318-0.241)= -0.118 (V/SCE)

Menghitung laju korosi masing masing logamr =

r Fe ==4.195 x 10-07 mpy

r Zn ==3.052 x 10-07 mpy

r Fe ==4.471 x 10-07 mpy

r Cu ==1.658 x 10-07 mpy

r Fe ==1.494 x 10-06 mpy

r Zn ==1.134 x 10-06 mpy

r Fe ==1.126 x 10-06 mpy

r Cu ==2.151 x 10-07 mpy

r Fe ==3.775 x 10-07 mpy

r Zn ==2.423 x 10-07 mpy

r Fe ==4.847 x 10-07 mpy

r Cu ==1.173 x 10-07 mpy