Akụkọ

Galvanizing na-ekpo ọkụ na-ekpo ọkụ, nke a makwaara dị ka ikpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ, bụ usoro dị irè nke mgbochi corrosion metal, nke a na-ejikarị maka ihe owuwu ígwè na ụlọ ọrụ dị iche iche. Ọ bụ imikpu akụkụ nchara ahụ emebi emebi na zinc a wụrụ awụ na ihe dịka 500 ℃ iji jide oyi akwa zinc n'elu ihe nchara ahụ, si otú ahụ nweta ebumnuche nke mgbochi corrosion. Hot itinye galvanizing usoro eruba: okokụre ngwaahịa pickling - mmiri ịsacha - na-agbakwụnye inyeaka plating ngwọta - ihicha - nghọta plating - jụrụ - ọgwụ - ihicha - polishing - mmecha nke na-ekpo ọkụ itinye galvanizing 1. Hot itinye galvanizing galvanizing na-mepụtara si okenye na-ekpo ọkụ itinye galvanizing usoro. , ma nwee akụkọ ihe mere eme nke ihe karịrị afọ 170 kemgbe France tinyere ikpo ọkụ na-ekpo ọkụ na ụlọ ọrụ na 1836. N'ime afọ iri atọ gara aga afọ, na ngwa ngwa mmepe nke oyi akpọrepu strip steel, na-ekpo ọkụ itinye galvanizing ụlọ ọrụ etolitela n'ọtụtụ buru ibu.
Galvanizing na-ekpo ọkụ na-ekpo ọkụ, nke a makwaara dị ka ihe na-ekpo ọkụ na-ekpo ọkụ, bụ usoro maka inweta ihe mkpuchi ígwè na ihe ndị dị nchara site n'itinye ha na zinc a wụrụ awụ. Site na mmepe ngwa ngwa nke nnyefe ọkụ eletrik dị elu, njem, na nkwukọrịta, ihe ndị a chọrọ maka nchebe nke akụkụ ígwè na-arịwanye elu, na ọchịchọ maka ikpo ọkụ na-ekpo ọkụ na-arịwanye elu.

Ọrụ nchekwa
N'ozuzu, ọkpụrụkpụ nke galvanized oyi akwa bụ 5 ~ 15 μm. Igwe ọkụ na-ekpo ọkụ na-ekpo ọkụ na-adịkarị na 35 μ N'elu m, ọbụna ruo 200 μm. Ịkụnye ọkụ na-ekpo ọkụ na-ekpo ọkụ nwere ikike mkpuchi dị mma, mkpuchi dị oke, na enweghị ihe ntinye nke organic. A maara nke ọma na usoro nke zinc na-eguzogide corrosion ikuku na-agụnye nchedo igwe na nchedo electrochemical. N'okpuru ọnọdụ corrosion ikuku, elu nke akwa zinc nwere ZnO, Zn (OH) 2, na ihe nkiri nchebe zinc carbonate bụ isi, nke na-ebelata nrụrụ nke zinc ruo n'ókè ụfọdụ. Ọ bụrụ na ihe nkiri nchebe a (nke a makwaara dị ka nchara ọcha) mebiri emebi, ọ ga-emepụta oyi akwa ihe nkiri ọhụrụ. Mgbe oyi akwa zinc mebiri nke ukwuu ma na-etinye mkpụrụ nke ígwè ahụ n'ihe ize ndụ, zinc na-enye nchebe electrochemical na mkpụrụ. Ụdị ikike nke zinc bụ -0.76V, na ike ọkọlọtọ nke ígwè bụ -0.44V. Mgbe zinc na ígwè na-etolite micro batrị, zinc na-agbaze dị ka anode, na ígwè na-echebe dị ka cathode. N'ụzọ doro anya, nguzogide corrosion ikuku nke na-ekpo ọkụ itinye galvanizing na isi ígwè ígwè dị mma karịa nke electrogalvanizing.
Usoro nhazi mkpuchi zinc
The e guzobere usoro nke na-ekpo ọkụ itinye galvanized oyi akwa bụ usoro nke akpụ ígwè zinc alloy n'etiti ígwè mkpụrụ na dị ọcha zinc oyi akwa n'èzí nke Z. The ígwè zinc alloy oyi akwa na-guzobere n'elu nke workpiece n'oge na-ekpo ọkụ itinye plating, nke. na-enye ohere maka njikọ dị mma n'etiti ígwè na akwa zinc dị ọcha. Usoro nwere ike nanị kọwara dị ka ndị a: Mgbe ígwè workpiece na-emikpu ke a wụrụ awụ zinc mmiri mmiri, zinc na zinc mbụ kpụrụ na interface α Iron (isi isi) siri ike gbazee. Nke a bụ kristal kpụrụ site na igbari atọm zinc na steeti siri ike nke ígwè isi ala. Atọm ọla abụọ a jikọtara ọnụ, na mmasi dị n'etiti atọm ahụ pere mpe. Ya mere, mgbe zinc ruru saturation na agbaze siri ike, atom abụọ nke zinc na ígwè na-agbasa n'etiti ibe ha, na atom zinc gbasaa n'ime (ma ọ bụ banye n'ime) ígwè matriks na-akwaga na matrix lattice, jiri nwayọọ nwayọọ na-akpụpụta alloy na ígwè. , ebe ígwè na zinc gbasasịrị n'ime mmiri mmiri zinc a wụrụ awụ site na ígwè dị ike dị elu na-etolite ihe intermetallic FeZn13, nke na-abanye n'ime ala. nke ite galvanizing na-ekpo ọkụ, na-akpụ zinc slag. Mgbe a na-ewepụ ihe ahụ na-arụ ọrụ na ngwọta ntinye zinc, a na-emepụta akwa zinc dị ọcha n'elu, nke bụ kristal hexagonal. Ọdịnaya ígwè ya adịghị elu karịa 0.003%.
Esemokwu nka
Nguzogide corrosion nke galvanizing na-ekpo ọkụ dị elu karịa nke oyi galvanizing (nke a makwaara dị ka galvanization). Hot galvanizing agaghị nchara n'ime afọ ole na ole, ebe oyi galvanizing ga-nchara n'ime ọnwa atọ.
A na-eji usoro electrogalvanizing echebe ọla site na corrosion. "A ga-enwe ezigbo mkpuchi mkpuchi ígwè na nsọtụ na n'elu ngwaahịa ahụ, nke na-agbakwụnye akụkụ mara mma na ihe bara uru. N'oge a, nnukwu ụlọ ọrụ na-enwewanye ihe achọrọ maka akụkụ ngwaahịa na teknụzụ, yabụ ọ dị mkpa ịgbanwe teknụzụ n'oge a. "