I-Galvanic Corrosion yiNkqubo yeMichiza eqondwa kakuhle
I-Galvanic i-corrosion inokuphela kuphela xa iimbane zombini ze-electrochemically zihlala zifuphi kunye kwaye zifakwe ngaphakathi kwi-electrolytic liquid (njengamanzi atyuwa).
Xa oku kwenzekayo, isinyithi kunye ne-electrolyte zenza iselvali eseli. Iseli inefuthe lokutshisa esinye isinyithi ngentlawulo enye.
Kwimeko ye-Alarm, isitye sasiqhelana nexabiso lentsimbi. Kwiminyaka emibini nje emva kokubamba iipilisi zethusi, izikhonkwane zensimbi ezazisetyenziselwa ukubamba ubhedu kwindawo engaphantsi kweekhephe zazivele ziqine kakhulu, zenze ukuba amashiyibhethi ethusi abe.
Indlela i-Galvanic Corrosion isebenza ngayo
Iimali kunye neesalathisi zetsimbi zinamalungelo athile e-electrode. I-electrode potentials isilinganiselo esifanelekileyo sendlela yentsimbi yokusebenza kwi-electrolyte. Eyona nto isebenzayo, okanye ingabonakali kakuhle, isinyithi yinto enokwenzeka ukuba yenze i-anode (i-electrode ehlawulweyo ngokufanelekileyo) kwindawo ye-electrolytic. Ukusebenza okungaphantsi, okanye ubuninzi bezinyithi, kunokwenzeka ukuba yenze i-cathode (i-electrode ehlawuliswayo kakubi) xa kwimeko enye.
I-electrolyte isebenza njengendlela yokufuduka kwe-ion, i-ion zensimbi ezihambayo ukusuka kwi-anode ukuya kwi-cathode. I-anode yensimbi, ngenxa yoko, iqhubhisa ngokukhawuleza kunokuba ingenjalo, ngelixa i-cathode isinyithi ikhupha ngokukhawuleza kwaye, kwezinye iimeko, inokuthi ingadli.
Kwimeko ye- Alarm , isinyithi sobutyebi obukhulu (ubhedu) senza njenge-cathode, ngelixa isinyithi esincinci sinokusebenza njenge-anode.
Ion Iron zalahleka ngendleko yobhedu, ekugqibeleni kubangelwa ukutshabalalisa ngokukhawuleza kwezipikili.
Indlela Yokukhusela I-Galvanic Corrosion
Ngokuqonda kwethu okwangoku kwe-galvanic corrosion, iinqanawa ezixutywe ngetsimbi zifakwe 'iinqanaba zedini', ezingadlala indima ngqo kwinkqubo yomkhumbi, kodwa zikhusela izakhiwo zesakhiwo. Amagqabi ahlawulayo ayenziwa nge- zinc kunye ne- magnesium , izitye ezinezinto ezinamandla kakhulu. Njengama-anode okubingelelwa ahlaziye kwaye ahlahloke kufuneka atshintshwe.
Ukuze uqonde ukuba yintoni isinyithi esiya kuba yi-anode kwaye esiya kwenza njenge-cathode kwimimandla ye-electrolytic, kufuneka siyiqonde i-stadium okanye i-electrode. Oku kulinganiselwe ngokubhekiselele kwi-Standard Calomel Electrode (SCE).
Uluhlu lwezinyithi, oluhlelwe ngokwezixhobo ze-electrode (ubuchule) kumanzi olwandle olumanzi lunokubonakala kwitafile ngezantsi.
Kufuneka kwakhona kuboniswe ukuba ukubola kwe-galvanic akukhona nje kuphela kumanzi. Amaseli aseGalvanic angenza kuyo nayiphina i-electrolyte, kubandakanywa umoya omanzi okanye umhlaba, kunye neemeko zamachiza.
I-Galvanic Series In Water Water Flow
| I-Electrode esebenzayo kaRhulumente | Ubungakanani bendalo, iiVolts (I-Saturated Calomel Half-Cell) |
| IGraphite | +0.25 |
| Platinum | +0.15 |
| Zirconium | -0.04 |
| Uhlobo lwe-316 Insimbi engenasici (Passive) | -0.05 |
| Uhlobo 304 Insimbi engabonakaliyo (Passive) | -0.08 |
| Monel 400 | -0.08 |
| Hastelloy C | -0.08 |
| Titanium | -0.1 |
| Isiliva | -0.13 |
| Uhlobo lwe-410 Insimbi engabonakaliyo (Passive) | -0.15 |
| Uhlobo lwe-316 Insimbi engabonakaliyo (esebenzayo) | -0.18 |
| Nickel | -0.2 |
| Uhlobo 430 Insimbi Engenasici (Passive) | -0.22 |
| I-Alloy Alloy 715 (i-70-30 ye-Cupro-Nickel) | -0.25 |
| I-Alloy Alloy 706 (i-Cup-Nickel engama-90-10) | -0.28 |
| I-Alloy Alloy 443 (i-Admiralty Brass) | -0.29 |
| G Bronze | -0.31 |
| I-Alpine Alloy 687 (Aluminium Brass) | -0.32 |
| ICopper | -0.36 |
| I-Alloy 464 (I-Braal Rolled Brass) | -0.4 |
| Uhlobo lwe-410 Insimbi engabonakaliyo (esebenzayo) | -0.52 |
| Uhlobo 304 Insimbi engabonakaliyo (esebenzayo) | -0.53 |
| Uhlobo lwe-430 Insimbi engabonakaliyo (esebenzayo) | -0.57 |
| IConbon Steel | -0.61 |
| Jula i-ayini | -0.61 |
| Aluminium 3003-H | -0.79 |
| Zinc | -1.03 |
Umthombo: ASM Handbook, Vol. 13, Ukuchithwa kweTitanium kunye neTitanium Alloys, iphe. 675.