Txheej txheem cej luam thiab ntsiab lus
TIAB SA 3589:Tus qauv tseem ceeb yog"IS 3589: Cov Yeeb Nkab Hlau rau Dej thiab Dej Dej". Cov Khaub Ncaws Khaub Ncaws no qhia txog qhov yuav tsum tau ua rau cov kav dej steel siv rau kev siv dej, dej, thiab dej phwj tuaj.
Annexure C:Qhov no yog ib feem ntxiv ntawm tus qauv. Annexures tuaj yeem yog tus qauv (yuav tsum tau) lossis qhia (kev taw qhia). Annexure C yog feem ntaukev cai, lub ntsiab lus yog tias koj teev cov txheej txheem sab hauv epoxy rau IS 3589 yeeb nkab, txheej txheej yuav tsum ua raws li cov kev xav tau hauv qhov txuas ntxiv no.
Lub hom phiaj ntawm cov txheej txheem sab hauv no yog tsim kom muaj kev cuam tshuam tsis tu ncua ntawm cov yeeb nkab steel thiab cov kua xa tawm (dej lossis dej phwj). Qhov no ua haujlwm rau:
Tiv thaiv cov yeeb nkab los ntawm sab hauv corrosion, ncua nws cov kev pab cuam lub neej.
Tswj dej kom zoolos ntawm kev tiv thaiv xeb thiab nplai los ntawm kev paug dej.
Txo hydraulic kev sib txhuam, raws li ib tug du epoxy hauv ob sab phlu tuaj yeem txhim kho kev khiav hauj lwm (qis Hazen-Williams coefficient).
Cov Lus Qhia Tseem Ceeb ntawm IS 3589 Annexure C
Cov ntawv txuas ntxiv qhia txog cov lus qhia tshwj xeeb rau cov khoom siv epoxy txheej, kev npaj nto, daim ntawv thov, kev sim, thiab kev tshuaj xyuas zaum kawg. Nov yog cov ntsiab lus tseem ceeb:
1. Txheej Khoom
Hom:Tus qauv feem ntau qhia txog aFusion-Tshuaj Epoxy (FBE)hmoov los yog ib qho zoo sib xws thermosetting epoxy txheej haum rau sab hauv daim ntawv thov.
Kev sib xyaw:Cov epoxy resin feem ntau yog aBisphenol-Ahom, kho nrog tus neeg sawv cev tsim nyog (piv txwv li, amine adduct).
Daim ntawv:Nws yog muab los ua ib qho khoom, zoo hauv av, dawb - cov hmoov ntws.
2. Properties ntawm Txheej hmoov
Cov hmoov yuav tsum tau raws li cov tshuaj thiab lub cev muaj zog ua ntej thov. Cov kev ntsuam xyuas tseem ceeb suav nrog:
Sieve Analysis:Txhawm rau kom ntseeg tau qhov tseeb particle loj faib rau cov ntawv thov sib xws.
Cov ntsiab lus tshauv:Ntsuas qhov tsis yog -volatile, inorganic cov ntsiab lus.
Gelation Lub Sijhawm:Lub sij hawm nws yuav siv sij hawm rau cov hmoov yaj thiab kho ntawm qhov kub thiab txias. Qhov no yog qhov tseem ceeb rau txoj kev thov.
Thermal yam ntxwv:Siv cov kev ntsuam xyuas zoo liSib txawv Scanning Calorimetry (DSC)txhawm rau xyuas qhov kub hloov pauv iav (Tg) thiab xyuas kom cov hmoov tsis ua ntej - kho.
3. Surface Kev npaj ntawm cov yeeb nkab
Qhov no yog ib kauj ruam tseem ceeb los xyuas kom meej adhesion. Sab hauv ntawm cov yeeb nkab steel yuav tsum tau muab ntxuav kom ze rau - dawb hlau tiav.
Txheem:Kev huv huv thiab qhov profile feem ntau yuav tsum tau ua kom tau raws liSa 2 ½as perSSPC-SP 10 / NACE No. 2los yog cov qauv sib npaug.
Anchor Profile:Qhov saum npoo yuav tsum muaj cov qauv thauj tog rau nkoj (roughness), feem ntau ntawm50-100 microns (2 mus rau 4 mils), muab ib tug neeg kho tshuab qhov tseem ceeb rau txheej.
4. Daim ntawv thov txheej
Txheej txheem:Cov yeeb nkab yog ua ntej-rhuab mus rau qhov ntsuas kub (feem ntau ntawm 180℃txog 250℃).
Txoj kev thov:Cov hmoov epoxy yog electrostatically txau mus rau qhov kub sab hauv ntawm cov yeeb nkab.
Kho:Cov cua sov los ntawm cov yeeb nkab ua rau cov hmoov yaj, ntws, thiab hla -txuas (kho) mus rau hauv cov yeeb yaj kiab tsis tu ncua.
5. Cov txheej txheem tiav tiav
Tom qab thov thiab kho, cov yeeb nkab coated yuav tsum ua raws li cov hauv qab no:
Thickness:Cov zaj duab xis qhuav tuab (DFT) yog nruj me ntsis txwv. Ib qho ntau yam yog400 txog 500 microns (kwv yees . 16 txog 20 mils). Thickness yog ntsuas nrog calibrated magnetic gauge.
Continuity (Holiday Detection):Tag nrho cov coated nto yog soj ntsuam rau pinholes los yog tsis xws luag siv aHigh -Voltage Holiday Detector. Qhov ntsuas hluav taws xob tau teev tseg raws li txheej txheej thickness (xws li, 5 volts ib micron).
Adhesion:Cov txheej yuav tsum muaj qhov zoo adhesion rau steel substrate. Qhov no yog kuaj los ntawm txoj kev zoo li ariam-adhesion testlos yog ntau qhov ntaurub-tawm adhesion test(piv txwv li, ua tiav qhov tsawg kawg nkaus ntawm 10 MPa).
Kev kuaj mob:Kev sim tshuaj (siv cov kuab tshuaj xws li Methyl Ethyl Ketone - MEK) yog ua kom ntseeg tau tias cov txheej txheem kho tau zoo. Ib tus lej ntawm rubs (piv txwv li, 50+ ob npaug rubs) yuav tsum tsis txhob soften lub txheej rau substrate.
6. Kev ua tau zoo thiab kev xeem yuav tsum tau ua
Cov qauv ntawm cov yeeb nkab coated yog kuaj los xyuas qhov kev ua tau zoo ntawm txheej txheej. Cov kev ntsuam xyuas tseem ceeb suav nrog:
Cathodic Disbondment:Ntsuas cov txheej tiv thaiv kev puas tsuaj raws li kev tiv thaiv cathodic (tseem ceeb rau cov kav dej faus).
Impact Resistance:Xyuas kom cov txheej tuaj yeem tiv taus kev tsim txom txhua yam thaum tuav thiab teeb tsa.
Flexibility / Khoov Test:Cov qauv coated yog khoov mus rau ib txoj kab uas hla los xyuas seb puas tawg lossis poob ntawm adhesion.
Chemical Resistance:Cov txheej txheem yuav tsum tiv thaiv cov kua dej uas nws yuav nqa (dej / dej phwj tuaj) thiab tsis tso cov tshuaj phem.
Cov lus xaus lus ntawm txheej txheej
| Khoom | Test Method (Tswj) | Yuav tsum muaj (Tswj) |
|---|---|---|
| Qhuav Zaj duab xis Thickness | Sib nqus ntsuas | 400 - 500 µm |
| Soj ntsuam xyuas | High -Voltage Spark Tester | Zero Hnub Caiv ntawm qhov ntsuas voltage |
| Adhesion | Rub -Tawm Kev Xeem | >10 MPa |
| Kho (MEK Test) | Solvent Rub Test | Tsis muaj softening rau substrate tom qab 50+ rubs |
| Impact Resistance | Poob qhov hnyav (piv txwv li, 1.5 kg) | Tsis muaj cracking ntawm teev Joules |
| Catholic Disbondment | 28-hnub xeem ntawm elevated T & V | Disbonded vojvoog <6 mm |
Daim ntawv tseem ceeb rau cov kws kho mob
Xa mus rau Tus Qauv Xeem Xeem:Ib txwm tau txais qhov feem ntau tam sim no version ntawmTIAB SA 3589los ntawm Bureau of Indian Standards (BIS). Cov lej tshwj xeeb thiab cov txheej txheem xeem tuaj yeem hloov kho.
Project Specifications:Rau txhua qhov haujlwm loj, daim ntawv qhia ntxaws txog qhov project (DPR) lossis cov ntaub ntawv sib tw yuav feem ntau hu tawm IS 3589 Annexure C kom meej meej thiab tej zaum yuav ntxiv cov kev cai nruj dua.
Ntawv pov thawj:Cov neeg thov txheej txheej feem ntau yuav tsum tau lees paub thiab yuav tsum muab daim ntawv pov thawj zeb xeem rau cov hmoov txheej txheej thiab cov ntaub ntawv tswj xyuas zoo rau txheej txheej txheej txheej.
Hauv cov ntsiab lus,IS 3589 Annexure Cmuab cov txheej txheem dav dav rau kev qhia meej, thov, thiab tsim nyog epoxy barrier txheej txheej rau cov kav dej steel hauv Is Nrias teb, kom ntseeg tau ntev -kev ua tau zoo thiab kev tiv thaiv dej hauv vaj tse.
