I. Txheej txheem cej luam ntawm Galvanized Steel Pipes
Txhawm rau txhim kho corrosion kuj ntawm cov kav hlau, lawv raug galvanization. Galvanized steel kav tau muab faib ua ob hom: kub-dip galvanized thiab txias-dip galvanized. Cov kav dej kub-dip galvanized muaj cov txheej tuab, sib npaug coated nrog muaj zog adhesion thiab ua haujlwm ntev. Hauv qhov sib piv, cov kav dej txias-dip galvanized, txawm tias tus nqi tsim nyog, muaj qhov tsis sib xws thiab tsis tshua muaj corrosion kuj piv rau cov kav dej kub-dip galvanized, uas ua rau lawv maj mam phasing tawm.
Keeb kwm, cov kav dej galvanized tau siv dav hauv cov tsev laus hauv Suav teb, thiab lawv tseem muaj zog hauv cov pa roj thiab cua sov. Raws li cov kav dej, cov kav dej galvanized khaws cov xeb thiab teev nyob rau lub sijhawm, ua rau muaj kab mob hauv cov kav dej thiab txhawb cov kab mob loj hlob ntawm lawv cov phab ntsa ntxhib. Qhov hnyav dua, corrosion tuaj yeem nce qib hlau hnyav hauv dej, ua rau muaj kev pheej hmoo mob hnyav. Hauv xyoo 1960 thiab 1970, cov teb chaws tsim kho tau pib tsim cov khoom siv yeeb nkab tshiab thiab maj mam txwv kev siv cov kav dej galvanized. Ib yam li ntawd, Tuam Tshoj Lub Tsev Haujlwm Saib Xyuas Kev Tsim Kho thiab peb lwm lub chaw haujlwm tau tshaj tawm txwv tsis pub siv cov kav dej galvanized txij li xyoo 2000 mus ntxiv. Niaj hnub no, cov kav dej galvanized tsis tshua muaj siv rau cov dej txias hauv cov chaw tsim kho tshiab, txawm tias lawv tseem tuaj yeem pom hauv qee qhov dej kub.
II. Kev faib tawm thiab cov yam ntxwv ntawm Galvanized Steel Pipes
Galvanized steel kav yog categorized rau hauv kub-dip thiab txias-dip hom, nrog rau tom kawg maj mam phased tawm.
Kub-dip Galvanized Steel Pipes
Kub-dip galvanizing muaj cov tshuaj tiv thaiv ntawm molten hlau thiab hlau substrate los tsim ib txheej txheej, khi rau substrate thiab txheej. Cov txheej txheem tsim khoom pib nrog pickling cov yeeb nkab steel kom tshem tawm cov hlau oxide ntawm nws qhov chaw. Tom qab ntxuav hauv ammonium chloride los yog zinc chloride tov, los yog sib tov ntawm ob qho tib si, cov yeeb nkab yog immersed nyob rau hauv ib tug kub-dip galvanizing da dej.
Cov yeeb nkab kub-dip galvanized steel tau dhau los ua cov tshuaj lom neeg lub cev thiab tshuaj lom neeg ntawm nws cov substrate thiab molten galvanizing tov, uas ua rau corrosion-resistant, nruj txheej txheej zinc-hlau alloy txheej. Cov txheej txheej hlau no sib txuas ua ke nrog cov zinc txheej ntshiab thiab cov hlau substrate, endowing kub-dip galvanized steel kav nrog cov txheej txheej, muaj zog adhesion, thiab kev pab lub neej ntev.
III. Kev tsim cov txheej txheem ntawm Galvanized Steel Pipes
Raws li cov txheej txheem ntau lawm ntawm cov kav dej galvanized yog tsis pub lwm tus paub ntawm cov tuam txhab, tsuas yog ib qho kev qhia dav dav tuaj yeem muab tau: a. Round steel npaj; b. Cua sov; c. Kub-dov thiab tho; d. Txiav taub hau; e. Pickling; f. Sib tsoo; g. Lubrication; h. Txias dov; i. Degreasing; j. Kev kho cua sov; k. Ncaj nraim; l. Cov yeeb nkab txiav; m. Pickling (dua, yog tias tsim nyog); n. Kev soj ntsuam zaum kawg.
