Engineering Kev zoo tshaj
enYam lus

Vim li cas Koj Thiaj Xav Tau Kev Tiv Thaiv Kev Tiv Thaiv Rau Offshore Steel Structures?

Oct 21, 2024

Tso lus

Txheej txheem cej luam

 

Marine ib puag ncig yog ib puag ncig corrosion complex, txawm tias nws yog offshore cua zog los yogoffshore steel qauvyuav fim corrosion ntawm seawater thiab microorganisms.

 

Qhov sib txawv ntawm Marine corrosion

 

Marine ib puag ncig feem ntau muab faib ua 5 qhov chaw xeb los ntawm sab saum toj mus rau hauv qab: Marine huab cua cheeb tsam, thaj chaw tshuaj tsuag tsuag, thaj chaw tidal thaj tsam, thaj chaw dej hiav txwv immersion (xws li thaj chaw hiav txwv ntiav, thaj chaw sab av loj, thiab thaj chaw hiav txwv tob), thiab thaj chaw submarine av. .

 

different areas of marine corrosion

 

 

Environmental Factors cuam tshuam rau Corrosion ntawm Offshore Steel Structure

 

Tus txheeb ze humidity ntawm huab cua

Qhov txheeb ze humidity nyob rau hauv cov huab cua yog ib qho ntawm cov tseem ceeb cuam tshuam rau atmospheric corrosion. Qhov tsawg kawg nkaus tus nqi ntawm tus txheeb ze av noo yuav tsum tau tsim rau cov dej zaj duab xis ntawm cov hlau nto yog hu ua qhov tseem ceeb humidity rau corrosion, thiab thaum tus txheeb ze humidity ntawm huab cua tshaj qhov tseem ceeb humidity, nws corrosion yuav nce sai heev.

Kub

Qhov kub thiab txias hloov cuam tshuam rau lub condensation ntawm dej vapor nyob rau saum npoo ntawm steel qauv, solubility ntawm corrosive gases thiab ntsev nyob rau hauv cov yeeb yaj duab dej, thiab tus nqi ntawm electrochemical reflection.

 

Corrosion ntawm steel qauv los ntawm marine microorganisms

Kev xeb ntawm cov qauv hlau los ntawm cov kab mob hauv dej hiav txwv yog vim qhov tseeb tias qee cov kab mob corrosive. Cov kab mob corrosive no cuam tshuam nrog lub ntuj tsim cov tshuaj sulfur, cov tseem ceeb yog cov kab mob sulfide thiab cov kab mob sulfate-txo cov kab mob. Cov kab mob no yog corrosive rau steel qauv nyob rau hauv ob qho tib si aerobic thiab anaerobic ib puag ncig.

 

3 Lub Ntsiab Tiv Thaiv Kev Tiv Thaiv Kev Tiv Thaiv rau Marine Steel Structures

weathering steel bridge

Huab cua steel

Feem ntauweathering steel phajsuav nrog Corten steel daim hlau, A588 steel daim hlau, SPA-H steel daim hlau, thiab lwm yam. Weathering steel siv tau yam tsis muaj kev pleev xim, ua rau nws cov khoom siv zoo heev thiab txo tus nqi tag nrho ntawm lub neej ntawm cov qauv hlau.

HDG steel staircases

HDG

HDG hu ua kub-dip galvanized, yog ib hom kev kho corrosion-resistant nto ntawm steel qauv. Kub-dip galvanizing ntawm steel qauv yog mus rau dip cov hlau Cheebtsam tom qab deg purification rau hauv lub melted zinc tov ntawm 460 ~ 469 degree kom cov nto ntawm cov hlau Cheebtsam yog adhered rau zinc txheej. Lub platform ua haujlwm thiab steel staircase feem ntau yog kub-dip galvanized.

offshore steel structures painted

Kev pleev xim

Painting yog ib qho ntawm feem ntau siv kev tiv thaiv corrosion rau cov qauv steel. Cov txheej txheej zoo yog nyob ntawm qhov kev kho kom zoo ntawm qhov chaw, thiab lub neej kev pab cuam ntawm lub txheej nrog kev ua haujlwm zoo sib txawv los ntawm ze li ntawm ib nrab ntawm tib txheej txheej tiv thaiv. Yog li ntawd, sandblasting feem ntau yog siv los tshem tawm xeb, thiab qhov chaw ntawm cov khoom siv hlau yuav tsum raug rau cov hlau nplaum, thiab tag nrho cov xeb thiab cov roj yuav tsum raug tshem tawm.