Ketebalan Lapisan Zn (μm)

LAMPIRAN 1

  Hasil perhitungan nilai ketebalan Hot Dip Galvanizing baja jenis P.22 dan S.22

  a. Baja Jenis P.22

Temperatur Proses Pelapisan Hot Dip Galvanizing Ketebalan Lapisan Zn (μm) Ketebalan Lapisan Zn Rata-Rata (μm) HDG 445°C

  87,6 (88,36 ± 1,493) 88,6

  88,9

  107 (105,66 ± 2,11) 104

HDG 450°C

  106

  119 (119 ± 1,00) 120

  

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HDG 455°C

  = =

  3 42485 ² −

  m n t t

  µ 119

  3 357 = = =

  ∑ ( )

  1 ^{2 2} − −

  = ∆

  ∑ n t n t t

  ( )

  2 119 .

  =

  2 = 105 66 , ± ∆ ±

  m

  µ 00 ,

  1 =

  ( ) ( ) µ m t t

  00 , ± 1 119 = ∆ ±

  88

  µ 36 ,

  m n t t

  118 T = 445°C T = 450°C

  T = 455°C

  1 36 , = 88 ± ∆ ± ( ) ( ) m t t µ 11 ,

  ∑ m n t t

  ∑ n t n t t

  µ 105 66 , 3 317 =

  = =

  ∑ ( )

  1 ^{2 2} − −

  = ∆

  ∑ n t n t t

  ( )

  1 ^{2 2} − −

  = ∆

  ( )

  ( ) ( ) m t t µ 493 ,

  2 36 , 88 .

  3 23426 93 , ² −

  =

  ( )

  2 . 105 66 , 3 33501 ²

  3 1 , 265 =

  µ m 493 ,

  1 =

  µ m

  11 , 2 =

  − =

  

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  b. Baja Jenis S.22

Temperatur Proses Pelapisan Ketebalan Lapisan Ketebal Lapisan Zn Hot Dip Galvanizing Zn (μm) Rata-Rata (μm)

  62,7 62,9 (62,70 ± 0,20)

HDG 445°C

  62,5 76,3 77,7 (77,16 ± 1,455)

HDG 450°C

  77,5 95,1 94,9 (94,90 ± 0,20)

HDG 455°C

  94,7 T = 445°C T = 450°C

  t t

  , 1 231 ,

  5

  ∑ ∑

  188 = µ µ

  t = =

  62 , 7 m t = = = 77 , 16 m

  n ₂ 3 n _{2 2}

  3 ₂

  t − n t t − n t ( )

  ( ) ∑ ∑

  ∆ t = ∆ t =

  n −

  1 n − ₂

  1 ₂ 11793 , 95 − 3 . ( 62 , 7 ) 17865 , 23 − 3 . ( 77 , 16 )

  = =

  2

  2 , 2 µ 1 , 455 µ

  = m = m 62 , 7 , 2 µ 77 ,

  16 1 , 455 µ

  ( t ± ∆ t ) ( = ± ) m ( t ± ∆ t ) ( = ± ) m

  T = 455°C

  t

  284 ,

  7

  ∑

  µ

  t = = =

  94 , 9 m

  n ₂

  3 ₂

  t − n t ( )

  ∑

  ∆ t =

  n −

  1 ₂ 27018 , 11 − 3 . ( 94 , 9 )

  =

  2 , 2 µ

  = m

  t ± ∆ t =

  94 , 9 ± , 2 µ m

  ( ) ( )

  

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LAMPIRAN 2

  Hasil perhitungan nilai kekerasan Hot Dip Galvanizing baja jenis P.22 dan S .22

  a. Baja Jenis P.22

Perlakuan Kekerasan Kekerasan rata-rata

  Hot Dip Galvanizing (VHN) (VHN)

  550 550 (550,33 ± 2,415)

HDG 445°C

  551 525 524 (524,66 ± 3,290)

HDG 450°C

  525 516 515 (515,33 ± 2,342)

HDG 455°C

  415 T = 445°C T = 450°C

  VHN

  VHN ∑

  1651 = 1574 =

  VHN = = 550 ,

  33 VHN = = 524 ,

  66

  n ₂ 3 n ₂

  3 _{2 2} VHN − n (

  VHN )

  VHN − n

  VHN ( )

  ∑ ∑

  ∆

  VHN = ∆

  VHN = n −

  1 n − ₂

  1 ₂ 908601 − 3 . 550 , 33 825826 − 3 . 524 ,

  66

  ( ) ( )

  = =

  2

  2 = 2 , 415 = 3 , 290

  (

  VHN ± VHN ∆ ) ( = 550 ,

  33 ± 2 , 415 ) (

  VHN ± VHN ∆ ) ( = 524 ,

  66 ± 3 , 290 ) T = 455°C

  VHN ∑

  VHN = = 1546 = 515 ,

  33

  n ₂

  3 ₂ VHN − n

  VHN ( )

  ∑

  ∆

  VHN = n

  1 − ₂

  796706 3 . 515 ,

  33 − ( )

  =

  2 = 2 , 342

  (

  VHN ± VHN ∆ ) ( = 515 ,

  33 ± 2 , 342 )

  

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  b. Baja Jenis S.22

Perlakuaan Kekerasan

  Hot Dip Galvanizing (VHN) Kekerasan rata-rata (VHN)

  532 532 (531,66 ± 3,311)

HDG 445°C

  531 530 531 (530 ± 1,00)

HDG 450°C

  529 527 526 (526 ± 1,00)

HDG 455°C

  525 T = 445°C T = 450°C

  VHN

  VHN ∑

  VHN = = 1595 = 531 ,

  66 VHN = = 1590 = 530

  n ₂ 3 n ₂

  3 _{2 2} VHN − n (

  VHN )

  VHN − n

  VHN ( )

  ∑ ∑

  ∆

  VHN = ∆

  VHN = n

  1 n

  1 − ₂ − ₂

  908601 3 . 531 , 66 825826 3 . 530 − ( ) − ( )

  = =

  2

  2 = 3 , 311 = 1 ,

  00

  (

  VHN ± VHN ∆ ) ( = 531 ,

  66 ± 3 , 311 ) (

  VHN ± VHN ∆ ) ( = 530 ±

  1 , 00 ) T = 455°C

  VHN ∑

  1578 = 526

  VHN = = n ₂

  3 ₂ VHN − n

  VHN ( )

  ∑

  ∆

  VHN = n −

  1 ₂ 796706 − 3 . ( ) 526

  =

  2 = 1 ,

  00

  (

  VHN ± VHN ∆ ) ( = 526 ±

  1 , 00 )

LAMPIRAN 3

  445°C 112,9 7,258 2,23 36 0,103469147 450°C 9,7 7,282 1,659 36 0,011910045 455°C 8,3 7,224 1,705 36 0,009995735

  

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  Hasil perhitungan nilai laju korosi Hot Dip Galvanizing baja jenis P.22 dan S.22

  a. Baja Jenis P.22 Perlakuan

   Hot Dip Galvanizing

  W1 (mg)

  ρ (gr/cm

  3

  ) A

  (inchi

  2

  ) Waktu

  (Jam) Laju Korosi

  (mpy) Tanpa Perlakuan 1318,1 5,897 1,735 36 1,910981617

• ₂
₁ W m m _i − = 3321 ,

  , 10 6502 = 11 −

• ∆ ∂

  2

  2 ² + = . 205 , 433 , .

  14 , 3 . , 2 433 . 14 , 3 .

  2 ² + = ₂ 520 , = 1 inchi

  t t A r r A

  A ∆

  ∂ ∂

  1 = 1318 1 , ± ∆ ±

  ∂ = ∆

  ∆ t r r r r + ∆ + =

  π π π

  2

  2

  4 , 719 005 ,

  , 2 005 15772 , = 8 +

  A rt r π π

  099 ,

  , 3181 gr

  ( ) W mg W _{i i}

  1 =

  mg

  = 1318 1 , _{2 2 1 1 1}

  m m W m m W

  W ∆

  ∂ ∂

  ∂ = ∆ _{2 1 1 2}

  ∆ m m m m + ∆ − =

  − 10 + =

  gr

  001099115 , =

  mg

  099 ,

  1 =

  , 6502 00005 , , 11 00005 3321 ,

• ∆ ∂
• ∆ ∂ ∂
• =
₃ 59548 , = 5 mm ₃

  1 6502 , 11 00005 ,

  v t m m

  ∆ ∂

  ∂

  ∂ = ∆

  ρ ρ ρ _{1 1}

  v v m m v

  ∆ − + ∆ = ₂ ¹ ₁

  1 00559548 , 975688 ,

  975688 ,

  cm gr

  1

  1 ₂ − + = ₃ 017 ,

  cm gr

  =

  ( ) ³

  , 897 017 ,

  5

  cm gr

  ± = ∆ ± ρ ρ

  =

  5

  

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  t t A r r A v ∆

  2

  = 054 , inchi

  ( ) ²

  , 520 054 , A 1 inchi A ± = ∆ ±

  t r v ²

  π = 2 , 5 . 11 . 14 ,

  3 ² = ₃

  = 1975 688 , mm ₃ 975688 , = 1 cm

  ∂ ∂

  11 = ₃ 897 ,

  = ∆

  ∆ t r r rt + ∆ = ²

  2 2 π π 005 ,

  , 005 759 88 , 216 , 359

  = 00559548 , cm

  ( ) ³

  , 976 00559 , = 1 cm v v ± ∆ ±

  v m ₁

  = ρ 975688 , 1 6502 ,

• ∆ ∂

  

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  ρ ρ ρ ρ

  ) 0241 , 911 , = 1 ( ± ∆ ±

  V V _{k k}

  MPY 02414449 , = MPY

  −

  1 3181 , 534 1 . ₂

  897 , 5 . , 735 36 .

  1 534 ₂ 017 ,

  897 , 5 . , 735 36 .

  1 . 1381 1 , 534 00005 ,

  054 , 897 , 5 . , 735 36 .

  WI M A t

  A t WI A A t

  . 534 . . . 534 . . 534

  ∆ − + ∆ − + ∆ = _{2 2} . .

  V _K

  MPY 910981617 ,

  = , 735 36 .

  ∂ = ∆

  ∂

  AT WI

  V _K

  ρ 534

  1 = ρ

  MPY A A MPY M WI MPY

  =

  5 . 1318 1 , 534

  , 897 1 .

• ∆ ∂

  ρ ∆

  ∂ ∂

  ∆ ∂

• − + =

  

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  b. Baja Jenis S.22 Perlakuan W1 A Waktu Laju Korosi

  ρ

  3

  2 Hot Dip Galvanizing (mg) (gr/cm ) (inchi ) (Jam) (mpy)

  Tanpa Perlakuan 1517,5 7,112 1,723 36 2,039313485 445°C 187,5 7,534 1,661 36 0,22225154 450°C 12,7 7,393 1,258 36 0,020254926 455°C 14,2 7,383 1,701 36 0,016773081

• W = m − m _i
_{1 2}

  13 , 7812 12 , 2637 = − = 1 , 5175 gr = 1517 , 5 mg

  ∂ W ∂ W ∆ W = ∆ m ∆ + m _{1 1 2}

  m m

  ∂ ∂ _{1 2} = − + m ∆ m m ∆ m _{2 1 1 2} 12 , 2637 , 00005

• = − 13 , 7812 , 00005

  = , 001302245 gr = 1 , 302245 mg

  W ± ∆ W = ( 1517 , _{i i} 5 ± 1 , 302245 ) mg ² + 2 π

  2 π

  A = r rt

  3 , 14 . , 433 2 . 3 , 14 . , 433 . , 201 = ₂ ²

• 2 .

  = 1 , 723 inchi ∂ A ∂ A

• ∆ A = ∆ r ∆ t ∂ r ∂ t 4 π r

  2 π r ∆ r + + = 2 π r ∆ t = + 8 , 159 , 005 ₂ 2 , 719 , 005

  = , 054 inchi

• ∆ ∂ ∂
• =
₃ 56094 ,

  937694 ,

  ∆ ∂

  ∂

  ∂ = ∆

  ρ ρ ρ _{1 1}

  v v m m v

  ∆ − + ∆ = ₂ ¹ ₁

  1 00556 , 937694 ,

  11 7812 , 13 00005 ,

  1

  7 =

  1 ₂ − + = ₃ 005634802 ,

  cm gr

  =

  ( ) ³

  , 112 00563 ,

  7

  cm gr

  ± = ∆ ± ρ ρ

  v t m m

  13 = 112 ,

  

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  = ∆

  ( ) ²

  , 723 054 , A 1 inchi A ± = ∆ ±

  t r v ²

  π = 1 , 5 . 11 . 14 ,

  3 ² = ₃

  = 1937 649 , mm ₃ 937694 , = 1 cm

  t t A r r A v ∆

  ∂ ∂

  ∆ t r r rt + ∆ = ²

  = ρ 937694 , 1 7812 ,

  2

  2 π π 005 ,

  , 005 759 88 , 308 , 352

  5

  = mm ₃

  = 00556094 , cm

  ( ) ³

  , 938 00556 , = 1 cm v v ± ∆ ±

  v m ₁

• ∆ ∂

  

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  534 WI

  V = _K

  ρ AT 534 . 1517 ,

  5 = 7 , 112 . 1 , 552 .

  36 = 2 , 039313485 MPY

  ∂ MPY ∂ MPY ∂ MPY ρ

  ∆ ∆ +

  V = M ∆ A ∆ _k

  ∂ WI ∂ A ∂ ρ 534 534 . WI 534 . WI

  M A ρ

  = ∆ − ∆ − ∆ + + _{2 2} ρ

  A . t . A . t . ρ A . t . ρ

  534 534 . 1517 ,

  5 , 00005 , 054

  = − ₂ + + 1 , 552 . 36 . 7 , 112 1 , 552 . 36 . 7 , 112 534 . 1517 ,

  5 − , 00563 ₂ 1 , 552 . 36 . 7 , 112

  = , 0726 MPY

  V ± ∆ _{K k} V = (

  2 , 0393 ± , 0729 ) MPY