8/13/2019 Pickling Passivation of Stainless Steels - Sidem

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LARSEN & TOUBRO LIMITED Project : SIDEM-MOBINMFY, Hazira Customer : SIDEM

Procedure No. : PC-SIDEM-SS PIC!"IN# - $%&e'isio( No. : %Date : )*-$+-)$$

PROCEDURE FOR CLEANING, DESCALING (PICKLING) AND PASSIVATION OFSTAINLESS STEELS

%.$ SCOPE

1) is sta(dard /rocedure co'ers te re0uireme(ts 1or c2ea(i(3 4 desca2i(3 5Pic62i(37 a(d/assi'atio( o1 stai(2ess stee2 o1 )$$,$$ series 1u228 a((ea2ed materia2 4 9$$ series co(tai(i(3 Cre0ua2 to or more ta( %;. Pic62i(3 a(d /assi'atio( sa22 $ 4Sidem s/ec.

.) Pic62i(3 4 Passi'atio( usi(3 !-) Paste or S/ra8. 5Sur1ace I((o'ators ma6e7

C2oride co(te(t o1 =ater used 1or /rocedure sa22

8/13/2019 Pickling Passivation of Stainless Steels - Sidem

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LARSEN & TOUBRO LIMITED Project : SIDEM-MOBINMFY, Hazira Customer : SIDEM

Procedure No. : PC-SIDEM-SS PIC!"IN# - $%&e'isio( No. : %Date : )*-$+-)$$

Nitric ?cid 5HNO7 $Be %$$ 2itres

+; H8dro12uoric ?cid 5HF7 )$ 2itresater *$$ 2itresSodium F2uoride )$ !3

So2utio( tem/erature sa22

8/13/2019 Pickling Passivation of Stainless Steels - Sidem

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LARSEN & TOUBRO LIMITED Project : SIDEM-MOBINMFY, Hazira Customer : SIDEM

Procedure No. : PC-SIDEM-SS PIC!"IN# - $%&e'isio( No. : %Date : )*-$+-)$$

.).).) !-) /aste sa22

8/13/2019 Pickling Passivation of Stainless Steels - Sidem

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LARSEN & TOUBRO LIMITED Project : SIDEM-MOBINMFY, Hazira Customer : SIDEM

Procedure No. : PC-SIDEM-SS PIC!"IN# - $%&e'isio( No. : %Date : )*-$+-)$$

- Nitric acid $-; : ; 5)$CM7

- Potassium Ferric8a(ide : ; 5$37

+.) C2ea( te sur1ace =it a c2ea( c2ot 4 demi(era2ized =ater.+. ?//28 te so2utio( usi(3 a /2astic s/ra8 a//2icator.

+.9 Co(tami(atio( is i(dicated