General Principles of Corrosion in Marine Environments

Corrosion ntawm LR FH55 steel phaj nyob rau hauv marine ib puag ncig yog ib tug complex electrochemical txheej txheem. Lub ntsiab yam tseem ceeb cuam tshuam rau corrosion muaj xws li muaj dej hiav txwv, yaj oxygen, salinity, kub, thiab muaj lwm yam corrosive yam xws li sulfides thiab chlorides. Seawater yog cov khoom siv hluav taws xob zoo heev, thiab cov pa oxygen yaj hauv nws ua raws li depolarizer, ua kom cov txheej txheem corrosion.

 

Salinity thiab Temperature Effects

Salinity: Nyob rau hauv cov cheeb tsam uas muaj salinity siab, xws li cov dej hiav txwv qhib, qhov corrosion ntawm LR FH55 steel phaj feem ntau yog siab dua. Qhov siab ntawm chloride ions hauv dej hiav txwv tuaj yeem nkag mus rau cov yeeb yaj kiab passive (yog tias muaj) ntawm cov hlau nto thiab pib pitting corrosion. Piv txwv li, nyob rau hauv Hiav txwv Liab, uas muaj ib tug kuj salinity siab, cov hlau phaj tej zaum yuav muaj corrosion hnyav dua nyob rau hauv cov cheeb tsam uas qis salinity, xws li ib co estuaries.

 

 

 

 

 

 

 

LR/FH55 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR/FH55	mm	Min Mpa	Mpa	Tsawg%	-60	J	J
	t Tsawg dua lossis sib npaug li 50	550	670-830	18%		37	55
	50＜t Tsawg dua lossis sib npaug rau 70	550	670-830	18%		37	55
	70＜t Tsawg dua lossis sib npaug rau 100	550	670-830	18%		37	55
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

 

 

Cov xwm txheej Hydrodynamic

Nyob rau hauv cov cheeb tsam uas muaj kev kub ceev dej ntws, xws li nyob ze ntawm lub hneev ntawm lub nkoj los yog nyob rau hauv cov cheeb tsam uas muaj zog tidal tam sim no, corrosion kuj ntawm LR FH55 steel phaj yuav cuam tshuam. Cov dej ntws tsis tu ncua tuaj yeem tshem tawm cov khoom ntawm corrosion los ntawm steel nto thiab nqa cov pa tshiab - cov dej hiav txwv nplua nuj, ua kom cov txheej txheem corrosion. Qhov no yog hu ua erosion - corrosion. Nyob rau hauv sib piv, nyob rau hauv cov dej stagnation ntawm dej, xws li nyob rau hauv ib co sheltered bays los yog nyob rau hauv lub sab hauv ntawm ballast tso tsheb hlau luam, lub corrosion tej zaum yuav ntau dua ntawm ib tug uniform hom, tab sis tsis muaj dej txav kuj yuav ua rau tsub zuj zuj ntawm corrosive tshuaj thiab kev loj hlob. biofilms, uas tuaj yeem cuam tshuam qhov corrosion kuj.

 

Biofouling thiab Microbiologically Influenced Corrosion (MIC)

Lub xub ntiag ntawm cov kab mob hauv hiav txwv tuaj yeem ua rau muaj kev cuam tshuam loj rau kev tiv thaiv corrosion ntawm LR FH55 steel phaj. Biofouling tshwm sim thaum cov kab mob xws li barnacles, mussels, thiab algae txuas rau ntawm cov hlau. Cov kab mob no tuaj yeem tsim micro - ib puag ncig uas yuav ua rau muaj kev cuam tshuam hauv zos. Piv txwv li, lub xub ntiag ntawm sulfate - txo cov kab mob hauv biofilms tuaj yeem tsim cov sulfides, uas yog cov corrosive heev thiab tuaj yeem ua rau pitting thiab hauv qab - deposit corrosion. Hauv cov cheeb tsam uas muaj qhov ntom ntom ntawm biofouling, corrosion kuj ntawm steel phaj tuaj yeem cuam tshuam loj heev.

 

 

 

 

 

Vim li cas thiaj xaiv peb?
Peb txaus siab rau peb lub peev xwm los muab cov kev cai daws teeb meem rau peb cov neeg siv khoom cov kev xav tau tshwj xeeb.
Peb txheeb xyuas thiab sib piv cov khoom dhau los thiab cov xwm txheej tam sim no ntawm peb LR FH55 Steel Phaj, thiab tsim cov kev qhia tshiab thiab cov txheej txheem.
Peb cov neeg siv khoom ntseeg peb kom xa cov khoom zoo Cold-rolled Steel khoom raws sij hawm thiab ntawm pob nyiaj siv.
Peb nruj me ntsis siv cov kev pab cuam sov so thiab kev xav tom qab muag, ua raws li kev txhim kho kev ua haujlwm zoo.
Peb muab ntau hom Cold-rolled Steel khoom kom tau raws li cov neeg siv khoom xav tau.
Peb ua raws li cov neeg siv khoom-centric thiab hom-taw qhia kev lag luam lub tswv yim, thiab txuas ntxiv muab cov neeg siv khoom txhim khu kev qha thiab cov khoom zoo thiab cov kev pabcuam.
Peb lub Hoobkas tau cog lus los txhawb nqa cov qauv siab tshaj plaws ntawm kev nyab xeeb thiab zoo.
Txhua tus neeg ua haujlwm ntawm peb lub tuam txhab thiab txhua lub tuam haujlwm ua haujlwm ua ke los ua ke kev tswj hwm kev lag luam, kev tshaj lij thev naus laus zis, kev txheeb cais ntau thiab kev kawm ideological.
Peb cov khoom siv Cold-rolled Steel paub txog lawv cov kav ntev thiab kev ntseeg tau.
Kev vam khom rau qhov zoo tshaj plaws thiab muaj txiaj ntsig zoo ntawm cov khoom loj, peb muaj peev xwm ua tau raws li qhov sib txawv ntawm peb cov neeg siv khoom.

Cim npe nrov: lr fh55 steel phaj, Tuam Tshoj lr fh55 steel phaj lwm tus neeg, hoobkas