Ngura Protection

Metal zvigadzirwa pamusoro nguva zvishoma nezvishoma akazadza ora patina. Construction akaparadza dzotsauka kuguruva. Kuti tidzivise anotambudzika nemigumisiro zvakadaro, unofanira kuziva ngura kuti simbi uye sei kuchengetedza naro. Metal iri pasi kudzikisirana nokuda pakunzwisisa zvokunze zvakatipoteredza, izvo electrochemically kana mishonga. Chemical ngura rinowanikwa nhau havasi vanokwanisa kuitisa magetsi (mafuta, gasi, alcohols). Akanga vachibatwa zvachose simbi dzose. Electrochemical ngura kunoitika nokuda panowanikwa electrolytic simbi firimu nokuda dzezvakatipoteredza zvinofurira. Kunyanya, zvakamubaya-hwokugadzira mhuri munyu kushandiswa mumigwagwa muchando, uye rakarasika dzenzvimbo. Nzira uye nzira inoitwa nayo kubva ngura, kune vazhinji.

Kupfuura dzakakurumbira uye kwakapararira ndiko kushandiswa coatings. Vakasvika simbi uye vasiri esimbi chicherwa. Greater efficacy zvinopa coatings yakavakirwa mukusika nhema chakaita zvokugadzirwa Polymers. Inorganic non-esimbi unhani chinhu zvakawanda. Izvi zvinosanganisira pendi (mafuta, alkyd uye enamel) uye varnishes (huni tara, chakaita zvokugadzirwa bhitumini). Kana kushandisa imwe ngura dziviriro yakadaro anosika nhete firimu zvakapoteredza simbi kubva unyoro uye zvakatipoteredza kushanda. Pendi uye varnishes zviri nyore chaizvo kushandisa, inokwanisika. Pakutanga basa zvakafanira mukanyatsochengeta kutevera mabikirwo chikumbiro chavo. Kavha zvesimbi pamusoro zvinokosha akawanda akaturikidzana kudzivirira zvivako nani kubva mumhepo simba.

Metallic coatings FIs kusiyanisa mhando mbiri. Yokutanga hwezvibayiro unhani zvinosanganisira cadmium, zingi, aruminiyamu. Wechipiri - ngura nemishonga unhani hwemhangura, sirivha, kutungamirira, nickel uye chromium.

Zvichienderana sei mashandiro chiito aita ngura dziviriro, inonzi cathode kana anode. Kune coatings zvesimbi, FIs rukuru electronegativity, uye coatings kuva mukuru electropositive. Anode coatings ndezvaJehovha mhando rokutanga cathode - kune wechipiri. Kushandiswa aruminiyamu zinc, sezvo cathode sezvo anode coatings - nickel, mhangura, tini.

Various nzira yokudzivirira simbi pamusoro ngura uye kunosanganisira wandei unhani embodiments. Somuenzaniso, nokuti kushanda kwemakemikari FIs rinoshandiswa nzira yokunamisa esimbi zvivako nedzimwe simbi: aruminiyamu, zinc.

Kana simbi mamiriro akaita ngura ipapo kubatsira kuderedza kuparadzwa passivating yokuvirisa uye FIs. Batsirawo Kuti chinovhiringidza ngura pezvakaitwa mu alkaline uye kusatsigira runyararo oxidants zvakadaro simba alkaline pasi uye sezvo alkali simbi. Kuti adzivirire chisimbiso mu zvakasimbisa kongiri, akashandisa karusiyamu nitrate-nitrite.

Kana uchida kudzivirirwa kubva ngura, kuitika pasi pokudzora kwomudzimu kwokunze kwezvakatipoteredza uye mumhepo kwemvura, shandisa kugadzikana FIs, izvo zvinhu izvo adsorb padenga simbi pamusoro kubva mhepo kana yaiitwa yakapfupikiswa pariri kuumba mutete rukoko.