Passivation - A Surface Treatment Process

Passivation - A Surface Treatment Process

Yekupedzisira update 08/29, nguva yekuverenga:5mins

Zvikamu mushure mekuita passivating

Imwe yematambudziko akanyanya kune vemetallurgists, ndeye kuchengetedza zvinhu kubva mukuora uye chero zvimwe zvinosvibisa maitiro ekugadzira senge machining, kugadzira, uye welding inogadzira marara, inclusions, simbi oxides, uye makemikari, girizi nemafuta.Nezvizvi, kana zvaiswa mumhepo nemvura, simbi zhinji dzinenge dziri panjodzi yekuora.Izvi zvinokonzeresa kuti chikamu chesimbi chiri pasi pekunetseka uye chinogona kuva nekukanganisa panguva yekugadzirwa kana pakupera kwechigadzirwa kushandiswa.Saka, pane chido chekudzivirira chikamu chesimbi kubva kune izvi zvinosvibisa uye kuora.Imwe nzira yakadaro ndeyesimbi passivation, nzira yekupa mutete uye yunifomu oxide layerkuwedzera corrosion resistance, kuwedzera chikamu chehupenyu, kubvisa kusvibiswa kwepamusoro, kuderedza njodzi yekusvibiswa kwechikamu uye kuwedzera nguva yekuchengetedza system.

Chinoshanda sei?

Kuchengetedza masimbi akasiyana-siyana kubva mukuora, indasitiri yemakemikari yekupedzisa tsika inoshandiswa zvakanyanya senge post-yekugadzira nzira inozivikanwa sePasivation.Mukuita uku, maoxidants akapfava akadai senitric uye citric acid anowanzo shandiswa.Iyo exogenetic isina simbi, sulphides uye zvimwe zvimedu zvekunze kubva pamusoro zvinogona kutorwa neaya acid uye kugadzira oxide layer kana firimu rinozoita sechidziviriro.Izvi zvinodzikisira mukana wekuti pave nekuita kemikari pakati pesimbi nemhepo, izvo zvinokweretesa kudzivirirwa kwepamusoro kubva mukuora pasina kushandura chimiro chayo.Chikamu chakakosha chechiitiko ichi ndechekuti asidhi haifanire kukanganisa simbi pachayo.

Matanho ePasivating process

Pane nhanho dzinonyanya nhatu mukuita kwekupfuura, izvo zvinogadzira yakazara yakaonda uye yunifomu oxide layer pane simbi yepasi.

Danho 1: Chikamu Chekuchenesa

Chikamu chesimbi chekuchenesa kureva, kubvisa chero mafuta epamusoro, makemikari kana marara akasara kubva mukugadzira ndiko kutanga kwemaitiro ekupfuura.Chikamu chekuchenesa chinoisa basa rakakosha mukuita uku, pasina danho iri, zvinhu zvekune dzimwe nyika pamusoro pesimbi zvichadzikamisa kushanda kwepassivation.

Danho 2: Acid Bath Kunyudzwa

Kuti ubvise chero zvimedu zvesimbi zvakasununguka kubva pamusoro, kunyudzwa kwechikamu mubhati yeasidhi kunotevera mushure mekuchenesa danho.Pane nzira nhatu dzakajairika dzinoshandiswa mudanho iri rekuita

Danho rechitatu:Nitric Acid Bath

Maitiro echinyakare ekuita passivation iNitric acid, iyo inogoverazve chimiro chemolecular chepamusoro pesimbi zvinobudirira.Nekudaro, nekuda kwekuiswa kwayo sechinhu chine njodzi, nitric acid ine zvimwe zvinokanganisa.Inoburitsa magasi ane muchetura ayo ane ngozi kune zvakatipoteredza uye angangoda nguva yakareba yekugadzirisa nekubata kwakakosha.

Danho 4:Nitric Acid ine Sodium Dichromate Bath

Iko kubatanidzwa kwe sodium dichromate mu nitric acid kunowedzera nzira yekupfuura nemamwe maalloys chaiwo.Iyi nzira isarudzo shoma, sezvo sodium dichromate inowedzera njodzi dze nitric acid yekugeza.

Citric Acid Bath

Iyo citric acid yekugezera ndiyo yakachengeteka imwe nzira kune nitric asidhi yekupfuura maitiro.Iyo haiburitse chero magasi ane muchetura, haidi chero yakakosha kubata uye zvakare iri eco-hushamwari maitiro.Iwo macompounds e citric acid passivation, ane njodzi yekukura kweorganic uye molds, izvo zvakanetsa kuwana kugamuchirwa.Mumakore achangopfuura, hutsva hwakabvisa matambudziko aya, zvichiita kuti ive nzira inodhura.

Kuti udzorere kupikisa kwesimbi kumararamiro ayo akasvibirira, zvisinei nemaitiro akashandiswa, iyi nzira yekugeza inobudisa kemikari inogadzirisa pamusoro pechikamu.Izvi zvichawedzera mutete uye yunifomu dhizaini yeokisisa firimu ine zvishoma-kune-isina iron molecule kuvapo.

Passivation Methodology

1.  Kunyudzwa kweTangi:Icho chikamu chichanyudzwa mutangi ine kemikari mhinduro uye inobatsira pakurapa ese ekugadzira nzvimbo panguva imwechete yekufanana kwekupedzisa uye optimum corrosion resistance.

2. KutendereraIyo yakanyatso kukurudzirwa kune pombi inotakura zvinwiwa zvinoparadza, umo kemikari mhinduro inotenderedzwa kuburikidza nehurongwa hwepombi.

3. Spray application:Mushonga wemakemikari unopfapfaidzwa pachikamu chepamusoro.Iyo chaiyo acid yekurasa uye nzira dzekuchengetedza dzakakosha kune iyi mhando yemaitiro uye ine mukana wepa-saiti kurapwa.

4. Gel Kushandisa:Nekukwesha pamastes kana gels kune chikamu chepamusoro, kurapwa kwemaoko kunogona kuitwa.Iyo ine pundutso pakurapwa kwemavara ewelds nedzimwe nzvimbo dzakaomarara dzinoda ruzivo rwemanyorero.

Ndezvipi zvinhu zvinogona Passivated?

·       AnodizingyeAluminium neTitanium.

·       Ferrous zvinhu zvakadai sesimbi.

·       Simbi isina tsvina, inogona kuva ne chrome oxide pamusoro.

·       Nickel, mamwe maapplication ane nickel fluoride.

·       Silicone, Silicone Dioxide iyo inoshandiswa muindasitiri yesemiconductor.

Zvishandiso zvePasivating process

Kuti uwedzere kusimba uye hupenyu hurefu, huwandu hwemaindasitiri hunoisa mari pazvinhu izvo vagadziri vakapedza kugadzira nekuita passivation.

Kurapa:Muchikamu chehutano, kudzikisa kusvibiswa-kusvibiswa pamidziyo yekurapa, nyanzvi dzinoshandisa nzira yekupfuura.Iyo oxide layer panzvimbo isina kuvhakacha inodzivirira kubva kune microscopic zvinosvibisa, zvichitungamira kune yakachena uye yakatsetseka nzvimbo iyo iri nyore kuchenesa.

Zvokudya uye Zvinwiwa:Izvo zvinodiwa zvehutsanana zvinhu zvakakosha kune akawanda maindasitiri. Kuti uderedze njodzi yekuora uye ngura inokanganisa michina kana yakabatwa zvigadzirwa zvekupedzisira, kufambiswa kwezvikamu kwakakosha.

Aerospace Industry:Izvo zvikamu zvingada passivation zvikamu Stainless Steel, Actuators, Hydraulic Actuators, Landing gear components, Control rods, Exhaust components mumajini ejeti uye Cockpit fasteners.

Heavy Equipment:Bhora Bearings uye Fasteners

Mauto:Pfuti uye Military equipment

Energy Sector:Simba rekugovera uye Kuendesa

Zvakanakira uye Cons of Passivating Maitiro

Pros

·       Kubviswa kwezvinosvibisa zvakasara mushure mekugadzira

·       Wedzera Corrosion Resistance

·       Yakaderedza njodzi yekusvibiswa panguva yekugadzira

·       Enhanced component performance

·       Yakafanana uye yakatsetseka kupera / kutaridzika

·       Shiny pamusoro

·       Easy kuchenesa pamusoro

Cons

·       Passivation haishande pakubvisa zvinosvibisa kubva kune dzakasungwa.

·       Zvinoenderana neyakatsanangurwa simbi alloy, tembiricha uye mhando yekemikari yekugezesa inofanirwa kuchengetedzwa.Izvi zvichawedzera mutengo uye kuoma kwemaitiro.

·       Iyo asidhi yekugezera inogona kukuvadza mamwe masimbi alloys, ane yakaderera chromium uye nickel yemukati.Saka, havagoni kuregererwa.

FAQs maererano Passivation

1.  Ko passivation yakafanana ne pickling?

Kwete, iyo Pickling process inobvisa marara ese, flux uye zvimwe zvinosvibisa kubva pamusoro pezvikamu zvakakandwa uye zvoita kuti zvigadzirire kufambisa.Pickling haigoni kuchengetedza simbi kubva pakuora, inongochenesa chete nzvimbo kuitira passivation.

2.  Ko passivation inoita Stainless steel corrosion proof?

Kwete, hapana chinhu chakadai se100% corrosion-proof.Nekudaro, zvikamu zvesimbi zvisina simbi zvine hupenyu hurefu hwakasiyana nekuda kwemaitiro ekupfuura.

3.  Ko kupfuudza kwesimbi isina simbi kunodiwa here?

Kwete, passivation inzira yakakosha yezvikamu zvesimbi isina tsvina.Icho chikamu chinozokwanisa kurwisa kubva mukuora munguva pfupi kwazvo pasina passivating process.