Cov Khoom Siv Cov Kws Tshaj Lij Cov Lus Qhia rau Corrosion, huv thiab ua raws li cov khoom noj khoom haus {}}}}}}}}}} kev siv hlau

Lub hauv paus rau phau ntawv

Kev tsim khoom noj yog cov ntaub ntawv -} }aveering kev sib tw. Tsis zoo li lwm yam kev lag luam, zaub mov- Hu rau cov chaw yuav tsum muajTxheej Txheem Kev Ntseeg, Tshuaj Kuj, Kev Nyab Xeeb Microbial, thiabKev Tswj FwmCov. Tsab ntawv no Cuag zaub mov - Cov hlau kom haum muag tshwj xeeb los ntawm kev pom ntawm cov ntaub ntawv engineering, tsom musCorrosion, Nto tiav tus cwj pwm, Kev Ncaj Ncees Kev Siv Hluav Taws Xob, thiabCov Qauv Ua Raws Cai.

1. Dab tsi ua rau cov hlau "zaub mov - nyab xeeb"?

Raws li cov zaub mov thoob ntiaj teb - tus qauv kev nyab xeeb (EU 1935/2004, GB 4806.9), cov zaub mov}}}}}}}}} {

Tsis tso cov tshuaj lom

Tiv thaiv corrosion nyob rau hauv kev cia siab siv

Tswj kev ncaj ncees

Muaj ib tug du, ntim tau zoo

Tiv thaiv cov tshuaj thiab huab cua txias thaum tog kev huv

2. Corrosion science nyob rau hauv ib puag ncig cov zaub mov

Corrosion yog qhov kev hem thawj loj tshaj plaws rau cov hlau kev nyab xeeb thiab lub neej. Hauv kev ua zaub mov noj, plaub daim ntawv ua haujlwm:

2.1 dav corrosion

Tshwm sim thaum cov kua qaub lossis tu tshuaj tshem tawm cov hlau nplaum.

2.2 pitting corrosion

Tshwj xeeb tshaj yog txaus ntshai vim tias pits tus kab mob nres tsheb.
Stainless hlau tsis nyob ntawm no thaum raugtus kab chlorides.

2.3 crevice corrosion

Tshwm sim hauv:

Overlapping Hlau Pob Qij

Cov welds tsis zoo

Riveted Cheeb Tsam

2.4 Galvanic corrosion

Tshwm sim thaum dissimilar me nyuam kov nyob rau hauv muaj dej noo.

3. Nto Cov Khoom Siv Huv Si & Kev Siv Neeg Tsim Kho

Khoom noj khoom haus nyab xeeb yog nyob ntawm qhov tiav.

3.1 Qhov Tseem Ceeb Ntawm Ra (Roughness)

Khoom noj -}} qib cov khoom siv feem ntau yuav tsum muaj:

Ra <0.8 μm

< 0.4 μm for high-hygiene zones

3.2 electropolishing

Kev siv tshuab hluav taws xob:

Tshem tawm micro -} roughness

Txhim kho corrosion tsis kam

Txo cov kab mob adhesion

Txhim kho kom huv

3.3 Passivation

Hla kev hloov dua tshiab chromium oxide ntawm cov chaw mos.

4. Cov ncauj lus kom ntxaws ntawm cov zaub mov-} cov hlau muaj kev nyab xeeb

4.1 Austenic Stainless hlau (304, 316)

Cov alloys tau nyiam rau lawv:

Siab corrosion tsis kam

Hwj txwv

Muaj meej

Lub Sij Hawm Tawb Passive

4.2 FerriticStainless hlau (430)

Siv qhov twg nickel rhiab lossis tus nqi yuav tsum tau tswj hwm.

4.3 alloys alloys

Siv tau qhov hnyav teeb meem tab sis txwv los ntawm acidity.

4.4 tooj liab & tooj dag

Antimicrobial tab sis chemically reactive.

4.5 Plated & Coated Steels

Yuav tsum tau tshuaj xyuas kom tsis txhob muaj txheej txheem ua tsis tiav.

5. Cov lus sib piv: corrosion tus cwj pwm hauv cov chaw noj mov

6. Kev Cai Tswj & Khoom Kuaj

6.1 cov cai thoob ntiaj teb

FDA 21 CFR: Toxicity, tsiv teb tsaws, huv

EU 1935/2004: Yuav tsum tsis txhob hloov cov khoom noj khoom haus

GB 4806.9-2016: Hnyav - Kev Tshawb Fawb Hlau

NSF / ANSI cov qauv: Khoom Siv Khoom Siv Khoom Noj Khoom Haus

6.2 Kuaj rau zaub mov noj

Cov ntaub ntawv yauv:

Acidic Migration Testing

Distilled - kev tsiv teb tsaws

High -} kub leaching kev xeem

Deg Roughness Kev Ntsuas

Ntsev - tsuag tsuag corrosion

7. Engineering Tsim cov tswv yim

7.1 Zam kev ua tiav

Siv pob tw khawm, tsis yog ncej puab pob qij txha.

7.2 Xaiv kho kom raug

316 rau cov kua qaub / ntsev

304 Rau General - lub hom phiaj

430 rau peev nyiaj - nco tau qis - cov khoom siv pheej hmoo qis

7.3 Luag thiab Kev Tshuaj Xyuas

Kev Electropolish

Ua passivate

Tshawb xyuas Welsds nyob rau hauv kev tshaj tawm

8. Kev tshawb nrhiav cov piv txwv

Bakery Racks

Siv 304 stainless nrog electropolish.

Nqaij Nruab Nrab Ua Khoom Siv

Siv 316 stainless xwb.

Muag haus ua

Tsawg pH xav tau 316 stainless lossis coated steel.

Nyeem ntxiv:Xaiv Khoom Noj - Kev Nyab Xeeb Hlau: Kev tshawb nrhiav tob ntawm cov khoom coj cwj pwm niaj hnub tsim

Tag

Khoom noj khoom noj - kev xaiv hlau kom zoo saib ntawm corrosion science, kev tsim kho kom huv, ua tiav nto, thiab kev cai tswj hwm. Raws li cov qauv no,316 stainless yog cov khoom siv tshaj plawsRau cov chaw ua noj hnyav tshaj plaws, thaum304 StainlessMuab cov kev ua tau zoo rau kev siv dav dav.