Compositional Analysis of Compositional Analysis of Soluble Salts - - PowerPoint PPT Presentation

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Compositional Analysis of Compositional Analysis of Soluble Salts - - PowerPoint PPT Presentation

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ISST- -2007 2007 ISST Compositional Analysis of Compositional Analysis of Soluble Salts in Bresle Bresle Extraction Extraction Soluble Salts in from Blocks in Newbuilding Newbuilding Shipyards Shipyards from Blocks in S.S. Seo Seo,

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SLIDE 1

ISST ISST-

  • 2007

2007

Compositional Analysis of Compositional Analysis of Soluble Salts in Soluble Salts in Bresle Bresle Extraction Extraction from Blocks in from Blocks in Newbuilding Newbuilding Shipyards Shipyards

S.S. S.S. Seo Seo, S.M. Son, C.H. Lee and K.K. Baek , S.M. Son, C.H. Lee and K.K. Baek Hyundai Heavy Industries Co., Ltd. Hyundai Heavy Industries Co., Ltd.

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SLIDE 2

2 2 Water Ballast TK Water Ballast TK

Steel Steel

I.O.Z. (15 I.O.Z. (15 µ

µm)

m)

Epoxy HB (160 Epoxy HB (160 µ µm) m) Epoxy HB (160 Epoxy HB (160 µ µm) m)

IMO IMO’ ’s PSPC s PSPC

P Performance erformance S Standard tandard For For P Protective rotective C Coating

  • ating
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SLIDE 3

3 3

Corrosion Control Corrosion Control

  • f Water Ballast TK:
  • f Water Ballast TK:
  • Steel Thickness

Steel Thickness

  • Protective Coating

Protective Coating

  • Sacrificial Anode

Sacrificial Anode

  • Maintenance

Maintenance

IMO IMO’ ’s PSPC s PSPC

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SLIDE 4

4 4

<50 mg/m <50 mg/m2

2 NaCl,

NaCl, Bresle Bresle, Min. , Min. 1 Point/Block 1 Point/Block Soluble Salt Soluble Salt Size [5],[4],[3]: remove to Rating [1] Size [5],[4],[3]: remove to Rating [1] Size [2],[1],[0]: Size [2],[1],[0]: remove if visible on steel remove if visible on steel Dust Dust

  • Min. 2 S/C; proven weld seams 1 S/C
  • Min. 2 S/C; proven weld seams 1 S/C

Brush, Roller (Specified area only) Brush, Roller (Specified area only) Edge Stripe Coating Edge Stripe Coating (S/C) (S/C) 2R, or 3 2R, or 3-

  • Pass or at least equiv.

Pass or at least equiv. Edge Preparation Edge Preparation Welds, Damaged Area <2%: St 3(Grinding) Welds, Damaged Area <2%: St 3(Grinding) Erection Joint Erection Joint Sa 2.5 Blasting, Profile: 30~75 Sa 2.5 Blasting, Profile: 30~75 µ µm m 1 1st

st, 2

, 2nd

nd Surface

Surface Treatment Treatment Annex 3, Avg. 3~4 points/10 m Annex 3, Avg. 3~4 points/10 m2

2

D.F.T. Measurement D.F.T. Measurement 2 2-

  • Coats, 320

Coats, 320 µ µm NDFT(90/10) m NDFT(90/10) D.F.T. D.F.T. P S P C P S P C ITEM ITEM

IMO IMO’ ’s PSPC s PSPC

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SLIDE 5

5 5

4.4 Basic coating requirements 4.4 Basic coating requirements Table 1 Table 1 -

  • 3.1 Secondary surface preparation

3.1 Secondary surface preparation Water soluble salts limit equivalent to NaCl after Water soluble salts limit equivalent to NaCl after blasting/grinding shall be blasting/grinding shall be ≤ ≤ 50 mg/m 50 mg/m2

2 of

  • f

sodium chloride (NaCl). sodium chloride (NaCl). Conductivity measured in accordance with Conductivity measured in accordance with ISO 8502 ISO 8502-

  • 9:1998.

9:1998.

IMO IMO’ ’s PSPC s PSPC

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SLIDE 6

6 6

Salt induced Blistering Salt induced Blistering

10mm 10mm

Osmotic Blistering Osmotic Blistering

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SLIDE 7

7 7 Conductivity Meter Conductivity Meter Test Patches Test Patches Measurement Beaker Measurement Beaker Pure water Pure water Syringes and Needles Syringes and Needles Sponges to wipe excess liquid Sponges to wipe excess liquid ISO 8502 ISO 8502-

  • 6: Salt Extraction

6: Salt Extraction ( (Bresle Bresle Method) Method) ISO 8502 ISO 8502-

  • 9: Salt Measurement via

9: Salt Measurement via Electrical Conductivity Electrical Conductivity

Bresle Bresle Method Method

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SLIDE 8

8 8

Electrical Conductivity Electrical Conductivity

Salt ( Salt (NaCl)

NaCl)

Cl Cl-

  • Na

Na+

+

Na Na+

+

Na Na+

+

Cl Cl-

  • Cl

Cl-

  • Electrolyte

Electrolyte Solution Solution

V = 10ml, A = 12.5cm V = 10ml, A = 12.5cm2

2,

, if if ΔΓ ΔΓ= 10 = 10µ µS/cm S/cm ρ ρA

A =

= C C x 10cm x 10cm2

2 x 10

x 10µ µS/cm S/cm ÷ ÷ 12.5cm 12.5cm2

2

= 4 = 4µ µg/cm g/cm2

2 or 4 mg/m

  • r 4 mg/m2

2 salt

salt (considered as NaCl) (considered as NaCl) ρ ρA

A = C.V.

= C.V.ΔΓ ΔΓ/A /A C C ≈ ≈ 0.5 0.5µ µg/cm g/cm2

2/

/µ µS (5Kg/m S (5Kg/m2

2/S)

/S)

SO SO4

4

  • 2

2

SO SO4

4

  • NO

NO3

3

  • 2

2

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SLIDE 9

9 9

Results & Findings Results & Findings

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SLIDE 10

10 10

Bresle Bresle Method Method ISO 8502 ISO 8502-

  • 6,

6, -

  • 9

9

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SLIDE 11

11 11

Ion Chromatography Ion Chromatography

DIONEX DIONEXTM

TM, DX300

, DX300

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SLIDE 12

12 12

Ion Chromatography Ion Chromatography

0.4 0.4 0.4 0.4 0.5 0.5 1.0 1.0 0.4 0.4 0.4 0.4 SO SO4

4 2 2-

  • PO

PO4

4 3 3-

  • 0.1

0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 NO NO3

3

  • 0.9

0.9 1.1 1.1 1.3 1.3 1.1 1.1 1.0 1.0 1.0 1.0 Cl Cl-

  • F

F E E D D C C B B A A Ion Concentration, Ion Concentration, PPM PPM( (㎎ ㎎/ /ℓ ℓ) )

Ion Conc. (mg/l) Ion Conc. (mg/l)

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SLIDE 13

13 13

NaCl vs. TDS NaCl vs. TDS

TDS: TDS: Total Dissolved Salt Total Dissolved Salt

59.5 59.5 18.2 18.2 0.9 0.9 1.52 1.52 30.6 30.6 5.1 5.1 F F 59.7 59.7 22.2 22.2 1.1 1.1 1.84 1.84 37.2 37.2 6.2 6.2 E E 59.2 59.2 26.3 26.3 1.3 1.3 2.2 2.2 44.4 44.4 7.4 7.4 D D 50.0 50.0 22.2 22.2 1.1 1.1 2.2 2.2 44.4 44.4 7.4 7.4 C C 59.1 59.1 20.2 20.2 1.0 1.0 1.7 1.7 34.2 34.2 5.7 5.7 B B 27.8 27.8 20.2 20.2 1.0 1.0 3.6 3.6 72.6 72.6 12.1 12.1 A A

㎎ ㎎/ /㎡ ㎡ ㎎ ㎎/ /ℓ ℓ ㎎ ㎎/ /ℓ ℓ ㎎ ㎎/ /㎡ ㎡ ㎲ ㎲/ /㎝ ㎝

NaCl NaCl Cl Cl-

  • Cl

Cl-

  • TDS

TDS Conductivity Conductivity Converted to Converted to Measured Measured Converted to Converted to Measured Measured NaCl/TDS NaCl/TDS (%) (%) Ion Chromatography Ion Chromatography Conductivity meter Conductivity meter Methods Methods

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SLIDE 14

14 14

NaCl ( NaCl (Bresle Bresle vs. IC)

  • vs. IC)

Sample No. Sample No.

Ion conc. mg Ion conc. mg/ /m m2

2

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SLIDE 15

15 15

NaCl ratio(%) in the extracted Salt NaCl ratio(%) in the extracted Salt

Sample No. Sample No.

(% (%) )

NaCl ( NaCl (Bresle Bresle vs. IC)

  • vs. IC)
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SLIDE 16

16 16

Tube glass Tube glass Sleeve Sleeve

Chlor Chlor*Test *Test™ ™

NaCl alone is detected ! NaCl alone is detected !

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SLIDE 17

17 17

Chlorine Paper/Strip Chlorine Paper/Strip

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SLIDE 18

18 18

NaCl Extraction Rate NaCl Extraction Rate

20 40 60 80 100 120 140

조건 3

Level (㎍ /㎠ )

Bresle Chlor*Test

1 2 3 4 5 6 7 8 9

조건1 조건2

Level (㎍/㎠)

Bresle Chlor*Test

Case 1 Case 1

3.7 : 1 3.7 : 1 32.5 32.5 121.7 121.7 Case 3 Case 3 1.4 : 1 1.4 : 1 5.7 5.7 7.9 7.9 Case 2 Case 2 2.0 : 1 2.0 : 1 2 2 4.1 4.1 Case 1 Case 1 Ratio (B:C) Ratio (B:C) Chlor Chlor*Test *Test TM

TM (

(㎍ ㎍/ /㎠ ㎠) ) Bresle Bresle Method( Method(㎍ ㎍/ /㎠ ㎠) )

Case 2 Case 2 Case 3 Case 3

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SLIDE 19

19 19

Conclusions Conclusions

  • 1. Upon using
  • 1. Upon using Bresle

Bresle Method, Method, actual content of actual content of NaCl was below 60% of TDS NaCl was below 60% of TDS. . 2.

  • 2. M

Many other anions any other anions were co were co-

  • existed

existed in the in the extracted solution. extracted solution. 3.

  • 3. IMO

IMO PSPC PSPC’ ’s s salt salt limit needs correction; limit needs correction; 1) 1) Bresle Bresle method: method: salts salts limit limit ≤ ≤ 8 80 0 mg/m mg/m2

2

2) Allow Chloride only measuring Method 2) Allow Chloride only measuring Method

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SLIDE 20

20 20

Thank you ! Thank you !