Sintesis Basa Schiff Dari Hasil Kondensasi Etilendiamin Dan Anilina Dengan Senyawa Aldehida Hasil Ozonolisis Metil Oleat Serta Pemanfaatannya Sebagai inhibitor Korosi Pada Logam Seng

a. Pembuatan larutan standar K

  2 Cr

  2 O 7 0,1 N

  Diketahui : berat kristal K

2 Cr

  2 O 7 = 14,7006 g

  Volume labu takar = 500 ml

  14,7006 gr 1000 N K2Cr2O7 = x

  294gr 500 ml � mol

  N = 0,1000 N

b. Pembuatan larutan standar Na

  

2 S

  2 O 3 0,1 N

  Diketahui : berat kristal Na

2 S

  2 O 3 .5 H

  2 O =6,2513 gr

  Volume labu takar = 250 ml

  6,2513 gr 1000

  Na2S2O3

  N = x 250gr 250 ml

  � mol

  N = 0,10002 N Larutan Na S O kemudian distandarisasi dengan larutan standar K Cr O

  2

  2

  3

  2

  2

  7 0,1000 N.

  

Volume Volume pentitrasi(K Cr O 0,1000 N) Volume

₂

_{2 7} Na ^{2 S 2 O 3} rata-rata

  V ¹ V ² V ³ 10 ml 9,75 ml 9,94 ml 9,89 ml 9,86

  V N =V N

  1

  1

  2

2 V K2Cr2O7 N K2Cr2O7 = V Na2S2O3 N Na2S2O3

  9,86 ml X 0,1000 N= 10 ml x N Na2S2O3

  9,86 ml X 0,1000 N N =

  Na2S2O3 10 ml

  N Na2S2O3 = 0,0986 N

  Diketahui : konsentrasi CH

3 COOH = 100 %

  Volume labu takar = 100 ml Konsentrasi setelah pengenceran = 20%

  Ditanya : volume CH

3 COOH yang digunakan ?

  V N = V N

  1

  1

  2

  2 V 1 x 100% = 100 ml x 20% 100 ml x 20%

  V

  1 = 100 %

  V

  1 = 20 ml

   Campuran, Metil Oleat Campuran, Campuran Aldehida Turunan Metil Oleat, Basa Schiff I dan Basa Schiff II.

  Bilangan iodin (IV) = (B-S) x N x 12,69 Berat sampel (g)

  4 Basa Schiff I 0,1516

  45,41 32,25 110,15

  109,98 0,1527 32.08 110,77 0,1505 32,48 109,02

  5 Basa Schiff II 0.1310

  45,41 27,90 169,61

  168,71 0,1347 27,35 170,14 0,1282 28,60 166,39

  Keterangan : B = Volume Titrasi Blanko (ml) S = Volume Titrasi Sampel (ml) N = Normalitas Na

  45,41 36,16 84,53

  2 S

  2 O

  3

  (0,0986N) Nilai Bilangan Iodin untuk Asam Oleat 1.

  (45,41-33,23) x 0,1000 x 12,69 0,1336

  IV =

  IV = 0,1336 15,4564

  88,03 0,1357 35,72 90,61 0,1351 35,94 88,95

  Oleat 0,1348

  No Sampel Berat Sampel(g) B,Vol.

  1 Asam Oleat

  Blanko (ml) S,Vol.

  Titrasi Sampel

  (ml) Bilangan

  Iodium (IV)

  Bilangan Iodium

  (IV) rata-rata

  Campuran 0,1336

  Aldehida Turunan Metil

  45,41 33,23 115,69

  115,78 0,1385 31,94 123,41 0,1287 34,43 108,26

  2 Metil Oleat

  Campuran 0,1371

  45,41 33.40 111,16

  110,85 0,1345 33,91 108,50 0,1397 32,98 112,91

  3 Campuran

  IV = 115,69

  3. Dilakukan cara yang sama untuk menghitung bilangan iodin untuk metil oleat campuran, campuran aldehida turunan metil oleat, Basa Schiff I dan Basa Schiff II.

  (45,41-31,94) x 0,1000 x 12,69 0,1385

  IV =

  IV = 0,1385 17,0934

  IV = 123,41 0,1287

  IV =

  IV = 0,1287 13,9336

  IV = 108,26

  1. Hasil Perendaman Lempeng Seng Tanpa Penambahan Inhibitor dalam Larutan Media Korosif HCl 0,1N

  Konsentrasi Inhibitor

  (ppm) Waktu perendaman

  (jam) Berat Awal

  Lempeng Seng

  (g) Berat

  Akhir Lempeng

  Seng (g) Kehilangan

  Berat Lempeng

  Seng (g) Efisiensi Inhibitor

  (%) 24 1.1495 1.0649 0.0846 - 48 1.1419 1.0551 0.0868 - 72 1.1483 1.0593 0.089 - 96 1.1243 1.0325 0.0918 - 120 1.1516 1.057 0.0946 -

2. Hasil Perendaman Lempeng Seng dengan Menggunakan Inhibitor Asam Oleat

  Campuran dalam Larutan Media Korosif HCl 0,1N

  Perendaman (jam) Berat Awal Lempeng Seng (g)

  

Berat

Akhir

Lempeng

Seng (g)

  Kehilangan Berat Lempeng Seng (g)

  Efisiensi Inhibitor (%) Efisiensi

  Inhibitor Rata- Rata(%) Asam oleat campuran 1000 ppm

  

24 1.1243 1.0548 0.0695 17.849%

17.435%

48 1.1326 1.0623 0.0703 19.009%

  72 1.14 1.0661 0.0739 16.966%

96 1.1324 1.0553 0.0771 16.013%

120 1.1423 1.0641 0.0782 17.336%

Asam oleat campuran 3000 ppm

  

24 1.1234 1.0577 0.0657 22.340%

21.091%

48 1.125 1.0569 0.0681 21.544%

72 1.1279 1.0575 0.0704 20.899%

96 1.1401 1.0672 0.0729 20.588%

120 1.1435 1.0679 0.0756 20.085%

  Asam oleat campuran 5000 ppm

24 1.1335 1.0698 0.0637 24.704%

  23.846%

48 1.1411 1.0758 0.0653 24.770%

72 1.13 59 1.068 0.0679 23.708%

96 1.1388 1.0687 0.0701 23.638%

120 1.1489 1.0755 0.0734 22.410%

Asam oleat campuran 7000 ppm

  

24 1.1306 1.0692 0.0614 27.423%

26.874%

48 1.1317 1.0687 0.063 27.419%

72 1.1446 1.0795 0.0651 26.854%

96 1.138 1.0701 0.0679 26.035%

120 1.1569 1.0875 0.0694 26.638%

  Konsentrasi Inhibitor (ppm) Waktu

  Hasil Perendaman Lempeng Seng dengan Menggunakan Inhibitor Metil Oleat Campuran dalam Larutan Media Korosif HCl 0,1N

  Metil Oleat Campuran 1000 ppm

  24 1.1359 1.083 0.0529 37.470% 36.195% 48 1.1439 1.0898 0.0541 37.673%

  Metil Oleat Campuran 7000 ppm

  72 1.1541 1.0943 0.0598 32.809% 96 1.1363 1.0747 0.0616 32.898% 120 1.1356 1.0701 0.0655 30.761%

  24 1.1406 1.0849 0.0557 34.161% 32.946% 48 1.1417 1.0845 0.0572 34.101%

  Metil Oleat Campuran 5000 ppm

  72 1.1451 1.0824 0.0627 29.551% 96 1.1333 1.069 0.0643 29.956% 120 1.149 1.0818 0.0672 28.964%

  24 1.1452 1.0873 0.0579 31.560% 29.997% 48 1.139 1.0782 0.0608 29.954%

  Metil Oleat Campuran 3000 ppm

  72 1.127 1.0617 0.0653 26.629% 96 1.1366 1.0694 0.0672 26.797% 120 1.1404 1.0696 0.0708 25.159%

  24 1.1431 1.0839 0.0592 30.024% 27.298% 48 1.1233 1.0607 0.0626 27.880%

  Rata- Rata (%)

  Konsentrasi Inhibitor

  (%) Efisiensi Inhibitor

  Efisiensi Inhibitor

  Lempeng Seng (g)

  Kehilangan Berat

  Lempeng Seng (g)

  Berat Akhir

  Lempeng Seng (g)

  Berat Awal

  Perendaman (jam)

  (ppm) Waktu

  72 1.1533 1.0966 0.0567 36.292% 96 1.1471 1.0876 0.0595 35.185% 120 1.1239 1.0618 0.0621 34.355% Hasil Perendaman Lempeng Seng dengan Menggunakan Inhibitor Campuran Aldehida Turunan Metil Oleat dalam Larutan Media Korosif HCl 0,1 N

  Konsentrasi Inhibitor

  72 1.1312 1.0781 0.0531 40.337% 96 1.1267 1.0678 0.0589 35.839% 120 1.1234 1.0622 0.0612 35.307%

  24 1.1254 1.0846 0.0408 51.773% 49.097% 48 1.1281 1.086 0.0421 51.498%

  Turunan Metil Oleat 7000 ppm

  Campuran Aldehida

  72 1.119 1.0709 0.0481 45.955% 96 1.1393 1.0894 0.0499 45.643% 120 1.1423 1.0896 0.0527 44.292%

  24 1.1109 1.0671 0.0438 48.227% 46.386% 48 1.1486 1.1033 0.0453 47.811%

  Turunan Metil Oleat 5000 ppm

  Campuran Aldehida

  72 1.1402 1.0885 0.0517 41.910% 96 1.1434 1.0897 0.0537 41.503% 120 1.1293 1.0731 0.0562 40.592%

  24 1.1314 1.084 0.0474 43.972% 42.121% 48 1.1425 1.0927 0.0498 42.627%

  Turunan Metil Oleat 3000 ppm

  Campuran Aldehida

  24 1.1257 1.076 0.0497 41.253% 38.589% 48 1.1452 1.0933 0.0519 40.207%

  (ppm) Waktu

  Turunan Metil Oleat 1000 ppm

  Campuran Aldehida

  Rata- Rata (%)

  (%) Efisiensi Inhibitor

  Efisiensi Inhibitor

  Lempeng Seng (g)

  Kehilangan Berat

  Lempeng Seng (g)

  Berat Akhir

  Lempeng Seng (g)

  Berat Awal

  Perendaman (jam)

  72 1.1297 1.084 0.0457 48.652% 96 1.1408 1.0919 0.0489 46.732% 120 1.1316 1.0813 0.0503 46.829% dalam Larutan Media Korosif HCl 0,1N Konsentrasi

  Inhibitor (ppm)

  35.452%

  45.190% 48 1.135 1.0886 0.0464 46.544% 72 1.1401 1.0912 0.0489 45.056% 96 1.1408 1.0891 0.0517 43.682%

  Etilendiamin 7000 ppm 24 1.1312 1.0878 0.0434 48.700%

  72 1.1348 1.0815 0.0533 40.112% 96 1.159 1.1032 0.0558 39.216% 120 1.1382 1.0796 0.0586 38.055%

  24 1.1454 1.0964 0.049 42.080% 40.142% 48 1.1325 1.0815 0.051 41.244%

  120 1.1366 1.0768 0.0598 36.786% Etilendiamin 5000 ppm

  38.120% 48 1.1568 1.1041 0.0527 39.286% 72 1.1417 1.0858 0.0559 37.191% 96 1.1409 1.0832 0.0577 37.146%

  Etilendiamin 3000 ppm 24 1.1441 1.0935 0.0506 40.189%

  48 1.14 1.0843 0.0557 35.829% 72 1.1378 1.0797 0.0581 34.719% 96 1.1248 1.0649 0.0599 34.749% 120 1.1214 1.0582 0.0632 33.192%

  Etilendiamin 1000 ppm 24 1.1473 1.0955 0.0518 38.771%

  Waktu Perendaman

  Rata- Rata (%)

  (%) Efisiensi Inhibitor

  Efisiensi Inhibitor

  Lempeng Seng (g)

  Kehilangan Berat

  Lempeng Seng (g)

  Berat Akhir

  Lempeng Seng (g)

  (jam) Berat Awal

  120 1.1343 1.0794 0.0549 41.966% Hasil Perendaman Lempeng Seng dengan Menggunakan Inhibitor Anilina dalam Larutan Media Korosif HCl 0,1N

  Konsentrasi Inhibitor (ppm) Waktu

  Perendaman (jam) Berat Awal

  Lempeng Seng (g)

Berat

Akhir

  

Lempeng

Seng (g)

Kehilangan Berat

  Lempeng Seng (g) Efisiensi Inhibitor

  (%) Efisiensi Inhibitor Rata-

  Rata(%) Anilina 1000 ppm 24 1.1331 1.0927 0.0404 52.246%

  49.104% 48 1.1186 1.0748 0.0438 49.539% 72 1.1526 1.1069 0.0457 48.652% 96 1.1289 1.0813 0.0476 48.148%

  120 1.1452 1.095 0.0502 46.934% Anilina 3000 ppm 24 1.1201 1.0826 0.0375 55.674%

  53.418% 48 1.1262 1.0864 0.0398 54.147% 72 1.1041 1.0629 0.0412 53.708% 96 1.1555 1.1118 0.0437 52.397%

  120 1.1339 1.0877 0.0462 51.163% Anilina 5000 ppm 24 1.1469 1.1191 0.0278 67.139%

  62.849% 48 1.127 1.0971 0.0299 65.553% 72 1.1266 1.0941 0.0325 63.483% 96 1.1611 1.1248 0.0363 60.458%

  120 1.1294 1.0893 0.0401 57.611% Anilina 7000 ppm 24 1.145 1.1229 0.0221 73.877%

  70.365% 48 1.1175 1.0928 0.0247 71.544% 72 1.1424 1.1161 0.0263 70.449% 96 1.1308 1.1017 0.0291 68.301%

  120 1.152 1.1214 0.0306 67.653% dalam Larutan Media Korosif HCl 0,1N

  Konsentrasi Inhibitor (ppm) Waktu

  Perendaman (jam) Berat Awal

  Lempeng Seng (g) Berat Akhir

  Lempeng Seng (g) Kehilangan Berat

  Lempeng Seng (g) Efisiensi Inhibitor

  (%) Efisiensi Inhibitor Rata- rata(%) 24 1.1399

  1.1 0.0399 52.837% Basa Schiff I 48 1.1438 1.1024 0.0414 52.304% 1000 ppm 72 1.1533 1.1097 0.0436 51.011% 51.489% 96 1.1399 1.0948 0.0451 50.871%

  120 1.1323 1.0854 0.0469 50.423% 24 1.1527 1.1217 0.031 63.357% Basa Schiff I 48 1.1351 1.1032 0.0319 63.249% 3000 ppm

  72 1.1459 1.1118 0.0341 61.685% 61.807% 96 1.146 1.1107 0.0353 61.547% 120 1.1414 1.1028 0.0386 59.197% 24 1.1217 1.0981 0.0236 72.104%

  Basa Schiff I 48 1.1185 1.0928 0.0257 70.392% 5000 ppm 72 1.132 1.1044 0.0276 68.989% 67.601% 96 1.1383 1.1084 0.0299 67.429%

  120 1.1406 1.1019 0.0387 59.091% 24 1.1297 1.1106 0.0191 77.423% Basa Schiff I 48 1.1248 1.104 0.0208 76.037% 7000 ppm

  72 1.1315 1.1069 0.0246 72.360% 73.301% 96 1.1306 1.104 0.0266 71.024% 120 1.1155 1.0868 0.0287 69.662% dalam Larutan Media Korosif HCl 0,1N

  Konsentrasi Inhibitor (ppm) Waktu

  Basa Schiff II 48 1.1321 1.1124 0.0197 77.304% 5000 ppm 72 1.1251 1.1037 0.0214 75.955% 75.640% 96 1.0987 1.0748 0.0239 73.965%

  x 100 % dimana:EI: Efisiensi Inhibitor W : Berat kehilangan tanpa inhibitor W

  1 W

  W - W

  Untuk menentukan nilai Efisiensi Inhibitor korosinya digunakan rumus sebagai berikut : EI (%) =

  72 1.1468 1.1283 0.0185 79.213% 80.094% 96 1.1217 1.1003 0.0214 76.688% 120 1.1467 1.1228 0.0239 74.736%

  120 1.1255 1.0997 0.0258 72.727% 24 1.1236 1.1126 0.011 86.998% Basa Schiff II 48 1.1262 1.1113 0.0149 82.834% 7000 ppm

  72 1.1193 1.0906 0.0287 67.753% 68.412% 96 1.1089 1.0783 0.0306 66.667% 120 1.1471 1.1138 0.0333 64.799% 24 1.1411 1.1227 0.0184 78.251%

  Perendaman (jam) Berat Awal

  120 1.1432 1.1073 0.0359 62.051% 24 1.1276 1.104 0.0236 72.104% Basa Schiff II 48 1.1216 1.0962 0.0254 70.737% 3000 ppm

  Basa Schiff II 48 1.1228 1.0928 0.03 65.438% 1000 ppm 72 1.1181 1.0857 0.0324 63.596% 63.985% 96 1.1331 1.0987 0.0344 62.527%

  (%) Efisiensi Inhibitor Rata- rata(%) 24 1.1372 1.1087 0.0285 66.312%

  Lempeng Seng (g) Efisiensi Inhibitor

  Lempeng Seng (g) Kehilangan Berat

  Lempeng Seng (g) Berat Akhir

  1 : Berat kehilangan dengan inhibitor Untuk konsentrasi 1000 ppm a.

  Selama 24 jam

  W - W

  1 EI (%) = x 100 % W

0,0695

  0,0846 - = x 100 % 0,0846 17,849 %

  = b.

  Selama 48 jam

  W - W

  1 EI (%) = x 100 % W

0,0703

  0,0868 - x 100 % = 0,0868

  = 19,009 % c.

  Selama 72 jam

  W - W

  1 EI (%) = x 100 % W

0,0739

  0,0890 - = x 100 % 0,0890 16,966 %

  = d.

  Selama 96 jam

  W - W

  1 EI (%) = x 100 % W

0,0771

  0,0918 - x 100 % = 0,0918

  `16,013 % = Selama 120 jam

  W - W

  1 EI (%) = x 100 % W 0,0946 - 0,0782 x 100 % =

  0,0946 17,336 % =

  Rata-rata efisiensi inhibitor :

• EI %
• EI % + EI % EI % EI %

  120 jam 24 jam 72 jam 96 jam 48 jam

  EI % = rata-rata

  5

• 17,849 % + 16,013 % + 17,336 % 19,009 % 16,966 % + =

  5 17,435 % = 2.

  Untuk konsentrasi 3000 ppm a.

  Selama 24 jam

  W - W

  1 EI (%) = x 100 % W

0,0657

  0,0846 - x 100 % = 0,0846

  = 22,340 % b.

  Selama 48 jam

  W - W

1 EI (%) = x 100 %

  W

0,0681

0,0868 - = x 100 %

  0,0868 21,544 % = Selama 72 jam

  W - W

1 EI (%) = x 100 %

  W 0,0890 - 0,0704 x 100 % =

  0,0890 20,899 % = d.

  Selama 96 jam

  W - W

1 EI (%) = x 100 %

  W

0,0729

0,0918 - x 100 %

  = 0,0918 20,588 % =

  e.

  Selama 120 jam

  W - W

1 EI (%) = x 100 %

  W 0,0946 - 0,0756 x 100 % =

  0,0946 20,085 % =

  Rata-rata efisiensi inhibitor :

• EI % EI % EI % EI %
• EI %

  120 jam

24 jam 96 jam

48 jam 72 jam

  EI % = rata-rata

  5 22,340 %

• 20,588 % + 20,085 % + + 20,899 % 21,544 % =

  5 = 21,091 % Untuk konsentrasi 5000 ppm a.

  Selama 24 jam

1 W

1 W

1 W

  0,0890 x 100 % = 23,708 %

  0,0918 x 100 % = 23,638 %

  x 100 % = 0,0918 -

0,0701

  EI (%) = W - W

  Selama 96 jam

  d.

  x 100 % = 0,0890 -

0,0679

  EI (%) = W - W

  EI (%) = W - W

  Selama 72 jam

  0,0868 x 100 % = 24,770 % c.

  x 100 % = 0,0868 -

0,0653

  EI (%) = W - W

  Selama 48 jam

  b.

  0,0846 x 100 % = 24,704 %

  x 100 % = 0,0846 -

0,0637

1 W

  Selama 120 jam

  W - W

  1 EI (%) = x 100 % W 0,0946 - 0,0734 x 100 % =

  0,0946 22,410 % =

  Rata-rata efisiensi inhibitor :

• EI % + + EI % EI % EI % + EI %

  120 jam

24 jam 96 jam

48 jam 72 jam

  EI % = rata-rata

  5 24,704 % 23,708 % + 23,638 % + 22,410 % + + 24,770 %

  =

  

5

23,846 % = 4.

  Untuk konsentrasi 7000 ppm a.

  Selama 24 jam

  W - W

  1 EI (%) = x 100 % W

0,0614

  0,0846 - = x 100 % 0,0846 27,423 %

  = b.

  Selama 48 jam

  W - W

1 EI (%) = x 100 %

  W

0,0630

0,0868 - x 100 %

  = 0,0868 = 27,419 % Selama 72 jam

  W - W

1 EI (%) = x 100 %

  W 0,0890 - 0,0651 x 100 % =

  0,0890 26,854 % = d.

  Selama 96 jam

  W - W

1 EI (%) = x 100 %

  W

0,0679

0,0918 - x 100 %

  = 0,0918 26,035 % =

  e.

  Selama 120 jam

  W - W

1 EI (%) = x 100 %

  W 0,0946 - 0,0694 x 100 % =

  0,0946 26,638 % =

  Rata-rata efisiensi inhibitor

• EI %
• EI % + EI % + EI % EI %

  120 jam

24 jam 72 jam 96 jam

48 jam

  EI % = rata-rata

  5 27,423 % + 26,035 % + 26,638 % +

• + 26,854 %

  27,419 % =

  5 26,874 % =

  Dilakukan perhitungan yang sama untuk menghitung nilai efisiensi metil oleat campuran, campuran aldehida turunan metil oleat, etilendiamin, anilina, Basa Schiff I dan Basa Schiff II.

  Aldehida Turunan Metil Oleat