Nɔgɔli ni sɔgɔli sababuw nɛnɛyɔrɔw la san damadɔ baara kɔfɛ

 

 

 

 

 

 

I. Core Corrosion Mechanism: Kuranko sɔgɔli bɛ fanga sɔrɔ nɔgɔ ni bɔgɔbɔli taabolo la

 

 

 

 

 

Nɛnɛbɔlanw nɛgɛmafɛnw (u fanba ye karɔbɔni nɛgɛ ye ani nɛgɛ galvanizelen) bɛ bila ji{0}}fiɲɛbɔyɔrɔ la waati jan kɔnɔ, yɔrɔ min na mikro galvanic selilɛri caman bɛ sɔrɔ nɔgɔya la u sanfɛla la, o bɛ kɛ sababu ye ka kuran sɔgɔli banbali lawuli – o ye nɔgɔ ni sɔgɔli sababu ju ye.

 

Nɛgɛ atomu minnu bɛ anode mara la, olu bɛ oksidan waleyaw kɛ ka u wuli dɔɔnin dɔɔnin ka kɛ nɛgɛ ionw ye (Fe → Fe2+ + 2e−), o bɛ kɛ sababu ye ka nɛgɛ matiriyali bɔnɛ ka taa a fɛ dɔgɔyali walew bɛ kɛ katodi yɔrɔ la, yɔrɔ min na oksizɛni wulilen ji la bɛ fara ɲɔgɔn kan ni ɛlektrɔnikiw ye ka hidrɔkisidi ionw (O2 + 2H2O + 4e− → 4OH−) lawuli, o bɛ to ka sɔgɔsɔgɔninjɛ waleya.

 

 

Ferrox hydroxyde [Fe(OH)2] min bɛ sɔrɔ sɔgɔsɔgɔninjɛ fɛ, o bɛ oksidan sɔrɔ ka taa a fɛ ka kɛ ferric hydroxide [Fe(OH)3] ye, a laban na, a bɛ kɛ nɔgɔ lajɔlen ye ani porous. Nɔgɔ tɛ i n’a fɔ nɛgɛ oksizɛni filimuw, nɔgɔ tɛ se ka mɔgɔ tanga; o nɔ na, ​​a bɛ ji ni oksizɛni minɛ, ka nɛgɛ kɔnɔna sɔgɔli teliya.

 

 

Kɛrɛnkɛrɛnnenya la ni kuloridi ionw bɛ ji la, u bɛ don joona passivasiyɔn filimu kɔnɔ nɛgɛ sanfɛ ka kɛ selilu datugulenw ye, o bɛ kɛ sababu ye ka sigida dingɛw sɔgɔ.

 

 

Ni dingɛw bɛ juguya ka taa a fɛ, perforation bɛ laban ka kɛ, o de ye perforation kuntaala surun- sababuba ye nɛnɛbɔyɔrɔ caman na.

 

 

 

 

 

 

II. Fɛn naani minnu bɛ teliya la: Nɔgɔ bɔli teliya kunbabaw san 3–5 kɔnɔ

 

(1) Ji lamininenw jogo juguyali bɛ dɔ fara a sɔgɔli hakɛ kan kosɛbɛ

 

 

 

 

 

 

Ji min bɛ lamini, o bɛ kɛ i n'a fɔ "katalisita" nɛnɛ sankanso sɔgɔli kama. Ji jogo tiɲɛni bɛ nɛgɛ sɔgɔli teliya k’a ɲɛsin a yɛrɛ ma, wa o de ye teliya sababu ye min nafa ka bon kosɛbɛ. Nɛnɛbɔlan baara senfɛ, ji wulicogo basigilen bɛ na ni kɔgɔw ye i n’a fɔ kuloridi ionw ni sulfate radikaliw ka caya ji la, o bɛ dɔ fara ji tacogo kan kosɛbɛ ani ka kuran sɔgɔli hakɛ bonya siɲɛ 3 fo siɲɛ 5.

 

 

O waati kelen na, ji lamininen pH hakɛ min ma kɔrɔsi, o bɛ sɔgɔli juguya: ni pH bɛ 6,5 duguma, ji bɛ kɛ asidi ye, wa a bɛ nɛgɛ matirili labɔ k’a ɲɛsin a yɛrɛ ma; ni pH tɛmɛna 9 kan, sɔgɔsɔgɔninjɛ bɛ sɔrɔ nɔgɔya la. Skala min bɛ nɛgɛ sanfɛla datugu, o bɛ kɛ sababu ye ka jukɔrɔ{3}}deposit corrosion, ka sigida oksizɛni hakɛ danfara don ani ka nɔgɔ teliya.

 

 

 

 

 

Ka fara o kan, nɛnɛbɔlanw ka fiyɛli ni fiɲɛ bilali bɛ oksizɛni wulilen fa ji la (a ka c’a la, miligaramu 8–10/L), o bɛ to ka katodiw ka wale barika bonya ani ka sɔgɔsɔgɔninjɛ min bɛ senna, o sabati. Fɛnɲɛnama misɛnninw i n’a fɔ banakisɛw ni jɛgɛ minnu bɛ ji la, olu bɛ biyofilimuw dilan, wa u farikoloɲɛnajɛ bɛ asidifɛnw bɔ i n’a fɔ sulfure d’hydrogène, o bɛ filimu passivasiyɔn tiɲɛ ka taa a fɛ nɛgɛ sanfɛ ani ka sigida sɔgɔli fanga bonya.

 

 

 

(2) Anti-Corrosion coatings ka dɛsɛ joona, o bɛ nɛgɛw bɔ lakanani barika la

 

 

 

 

Anti-nɔgɔli fini minnu bɛ nɛnɛ sankanso nɛgɛ yɔrɔw kan, olu bɛ kɛ i n’a fɔ nɔgɔli tangalan fɔlɔ. Ni nɛgɛw dacogo tiɲɛna joona, o bɛ nɛgɛw bila sigida la minnu bɛ tiɲɛ, o bɛ na ni nɔgɔ ye joona.

 

Datugulan dɛsɛ bɛ bɔ kɛrɛnkɛrɛnnenya la fɛn saba de la : fɔlɔ, jɔli nafama – sigili waati, nɛnɛbɔlan caman bɛ nɛgɛ sanfɛla nɔgɔ bɔ (u tɛ Sa2.5 sariya labato), o bɛ na ni nɔrɔli jugu ye finimuguw ni nɛgɛ matiriyaliw cɛ, ani o kɔfɛ, u bɛ kari ani ka u sɔgɔ filanan, sigida tiɲɛni – fiɲɛ min bɛ wele ko ultraviolet, tile funteni caman ɲɔgɔnna, ji bolicogo sɔgɔli ani buguri sɔgɔli fiɲɛ dafalenw na, o bɛ kɔrɔya dɔɔnin dɔɔnin ani ka finiw kari, o bɛ u lakanani tiɲɛ

 

 

sabanan, jɔli yɔrɔw – finiw tɛ se ka kɛ cogo kelen na weldaw, flansɛw ani fɛnw jogindaw la, ji ni buguri bɛ dalajɛ yɔrɔ minnu na, ka kɛ « balawu yɔrɔw » ye nɔgɔli la minnu bɛ nɔgɔ fɔlɔ ka don dɔɔnin dɔɔnin.

 

 

 

(3) Nafa minnu bɛ sɔrɔ fɛnw sugandili ni u jɔcogo la, olu bɛ fanga dɔgɔya sɔgɔsɔgɔninjɛ kunbɛnni na

 

 

Fɛnɲɛnɛma sugandibaliya ye fɛnba ye min bɛ sɔrɔ nɛnɛbɔyɔrɔw nɔgɔli waati kunkurunnin-nan na. Walasa ka musakaw dɔgɔya, fɛn dilannikɛla caman bɛ baara kɛ ni nɛgɛ gansan ye min bɛ kɛ ni karɔbɔli ye walima nɛgɛ galvanisé ye sankanso farikolow, dɛmɛnanw ani fɛn wɛrɛw kama, minnu tɛ se ka sɔgɔsɔgɔ kosɛbɛ, kɛrɛnkɛrɛnnenya la, kɔgɔ walima asidiji caman bɛ yɔrɔ minnu na, nɔgɔli hakɛ teliyalen don kosɛbɛ.

 

Galvanize layɛrɛ janya dɔgɔyali ani galvanize kɛcogo jugu bɛ kɛ sababu ye ka galvanize layɛrɛw sɛgɛn joona ani ka u bɔ, o bɛ bɔnɛ u lakanani nɔ na. O waati kelen na, nɛnɛbɔlan jɔcogo min tɛ hakili sɔrɔ, i n’a fɔ yɔrɔ minnu bɛ yɔrɔw fara ɲɔgɔn kan kojugu ani jibɔbaliya, o bɛ na ni ji dalajɛli ye waati jan kɔnɔ ani sigida laminiw minnu bɛ fɛnw tiɲɛ. Sankanso in fiɲɛbɔ fan min ma dila cogo bɛnbali la, o bɛ fiɲɛ bila ka ɲagami, o bɛ jikuruw sɔgɔli teliya nɛgɛw kan ani ka nɔgɔ juguya.

 

 

 

(4) Baarakɛcogo ni ladonni ɲɛnabɔcogo ɲuman tɛ, o bɛ sɔgɔli juguya

 

 

 

Baarakɛla caman bɛ nɛnɛbɔlanw baara don o don ani u ladonni kɔ, o bɛ kɛ sababu ye ka nɔgɔko koɲɛw to u tɛ dɔn ani u tɛ se ka kunbɛn, u laban bɛ kɛ teliya la ka kɛ bɔgɔdaga ye.

 

Ladonni dɛsɛ minnu ka teli ka kɛ, olu ye : ni i ma to ka ji lamininenw cogoya sɛgɛsɛgɛ ani ka sɔgɔsɔgɔninjɛ balilanw ni sɔgɔsɔgɔninjɛ balilanw fara a kan waati kɔnɔ, o bɛ na ni ji hakɛ tiɲɛni ye min bɛ to senna

 

ni aw ma to ka balansi, biyofilimuw ani nɔgɔw saniya sankanso kɔnɔ, o bɛ sigida sɔgɔli fanga bonya; dɛsɛ ka to ka anti-nɔgɔlanw sɛgɛsɛgɛ ani ka faraw ni u sɔgɔlenw dilan waati kɔnɔ, ka nɛgɛw bɔ kɛnɛ kan tuma bɛɛ;

 

nɛnɛ kɛlɛli fɛɛrɛw dɛsɛ nɛnɛ waati, o bɛ kɛ sababu ye ka nɛgɛ yɔrɔw kari ka da nɛnɛ-nɔgɔli sɛrɛkiliw kan ani ka kɛ kariyɔrɔw ye sɔgɔli kama.

 

 

 

III. Kuncɛli

 

 

Nɔgɔ ni bɔgɔbɔgɔli nɛnɛbɔyɔrɔw la san damadɔ baara kɔfɛ, o tɛ sɔrɔ fɛn kelen fɛ, nka a bɛ sɔrɔ kuran sɔgɔli faralen ɲɔgɔn kan i n’a fɔ u kɔnɔna, ka fara ji jogo tiɲɛni kan, finimugu tiɲɛni, fɛnw ni u jɔcogo tiɲɛni, ani baarakɛcogo ni ladonni dafabaliya.

 

 

Walasa ka nɛnɛbɔlanw ka baara waati janya, cɛsiriw ka kan ka daminɛ u bɔyɔrɔ la : ka fɛnw sugandi minnu bɛ se ka sɔgɔsɔgɔ kosɛbɛ-, ka fɛnw dacogo kɛ sariya ye min bɛ se ka sɔgɔsɔgɔninjɛ kɛlɛ, ka ji lamininenw jogoɲini barika bonya, ka don o don baarakɛcogo ni ladonni sɛgɛsɛgɛliw kɛ, ani ka sɔgɔsɔgɔninjɛ farati dogolenw ɲɛnabɔ waati bɛnnen na. O cogo dɔrɔn de la, sɔgɔsɔgɔninjɛ hakɛ bɛ se ka sumaya ka ɲɛ ani ka nɔgɔ ni sɔgɔsɔgɔninjɛ bali ka kɔn a waati ɲɛ.