Sau, wan n-gun, tsi mawan, n-gun zawn re ai hpaga lam ni hta, pipeline ni gaw sai lam ni zawn, shiga dap ni hpe htaw sa na lit kaba hpe gun hpai nga ai. Raitim, ndai pipe ni gaw, hka n-gun, n-gun n rawng ai tsi mawan ni, shing nrai, grai katsi ai shara ni hta, aten galu- aten galu hkam sha ai majaw, n-gun n rawng ai lam ni hpe hkam sha chye ai. Ndai lam gaw shanhte a service prat hpe kadun shangun ai sha n-ga, shim lum ai lam ni hpe mung byin shangun chye ai. N-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun yawm wa ai n-gun yawm wa ai lam gaw ndai manghkang hpe hparan ya ai. Laksan ladat langai hku nna, makawp maga ai n-gang ntsa kaw makawp maga ai layer langai mi hpe hpaw nna, makawp maga ai shingnip zawn galaw ai, pipe a asak hpe grai jat ya ai hte shim lum ai hkrang shapraw ai lam hpe galaw ya ai.
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Shi a npawt nhpang hta, n-gun n rawng ai n-gang pipe gaw, n-gun n rawng ai, n-gun n rawng ai, shing nrai, dingyang n-gun rawng ai, shing nrai, dingyang n-gun rawng ai-seam zawn re ai) naw rai nga ai, raitim, dai gaw, n-gun n rawng ai- hpe ninghkap lu ai arung arai ni hpe, pipe a kata hte shinggan maga de bang da ai. Ndai makawp maga ai layer ni hpe lang ai arung arai hte galaw sa wa ai lam hpe madung tawn nna, garan ginhka mai ai: coating, lining, hte electrochemical corrosion hpe makawp maga ai lam. Ndai hpaji masa ni hta coating gaw grau nna jai lang ai re.
Common coating galaw ai arung arai ni hta, epoxy powder coating (FBE),-layer polyethylene (3PE), polyethylene n-gun rawng ai n-gup magap, polyurethane ni lawm ai. 3PE hpe ga shadawn hku nna la nna, epoxy powder a npawt nhpang layer (stem pipe hte chemical hpe n-gun ja ai hku madi shadaw ya ai), n-gun rawng ai n-gun rawng ai lam (epoxy layer hpe shinggan polyethylene layer hte matut mahkai ya ai), hte polyethylene a shinggan layer (madun hkra hkra machyi ai lam hte UV nhtoi ni hpe hkam sharang lu ai) ni lawm ai. Ndai masum-}layer structure masum gaw ga hte panglai hka kaw na hka lim ai hpe ninghkap lu na matu synergistic hku bungli galaw ai, dai sha n-ga, lup makoi ai (sh) baw ntsa kaw na hka hpe mung hkam sharang lu ai.
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Metal corrosion gaw madung hku nna electrochemical reaction langai mi rai nga ai. Hka, oxygen, hte electrolytes ni (ga hta sau zawn re ai) ni hte matut mahkai ai shaloi, galvanic cell langai mi byin wa ai majaw, magri atom ni gaw electron ni hte oxidize (forming rust) hpe sum mat shangun ai. Corrosion- hpe ninghkap lu ai n-gang pipe ni gaw ndai ladat hpe lawu na ladat ni hku nna pat shingdang da ai:
Hkum hkrang garan ginhka ai lam: Hkrang nsam (sh) n-gup magap ni ( polyethylene (sh) ceramic zawn re ai ni) gaw, n-gun n rawng ai hka htung kaw na n-gang pipe hpe tsep kawp garan ginhka nna, hkrak n-gun n rawng ai.
Chemical passivation: Coating nkau mi (epoxy powder zawn re ai ni) gaw n-gang pipe ntsa hte n-gun ja ai passivation film langai mi hpe shabyin ya ai, electron hpe htawt sit ai hpe pat shingdang ya ai.
Electrochemical makawp maga ai lam: Myit htum ai ya aten na cathodic makawp maga lam (ICCP) hpaji masa (coating hte rau lang ai) gaw, n-gang pipe hpe nhtang wa shangun nna, dai hpe cathode langai zawn galai shai kau ai majaw, anode langai zawn n-gun n rawng hkra pat shingdang da ai.
Ga shadawn, lup makoi da ai sau hte wan sau pipeline ni a matu, 3PE coating gaw ga kaw na hka hte sau ni shang wa ai hpe ninghkap ya ai, cathodic makawp maga ai ladat gaw, makawp maga lam hpe grau nna makawp maga ya lu ai, coating hpe daw mi hkra machyi ai raitim, corrosion galaw ai lam hpe shayawm kau ya ai.
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Corrosion makawp maga ra ai lam ni gaw, bungli galaw ai lam amyu myu hta grai shai hkat ai majaw, grup yin manghkang ni hpe hparan na matu galaw da ai n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun amyu myu hpe shabyin ya ai:
Lup makoi da ai pipeline ni a matu: 3PE (sh) epoxy nhprang wan n-gun hpe grau ra sharawng ai. Shawng na gaw ga nhpu a n-gun hte hpun npawt ni hpe n-gun n jaw ai majaw, shingra wan hte sau hpe grau kaja hkra htaw sa na matu htuk manu ai; hpang jahtum na gaw npu n law ai- cost hte hka lim ai- hpe n-gun jaw ai majaw, hka jaw ai hte hka lim ai lam ni hta law law lang lang ai.
Panglai makau grup yin: Hka htung kaba, n-gun ja ai UV nhtoi ni, panglai hka kata de lup bang ai, epoxy powder + polyurethane (sh) titanium nano{1} hpe n-gun ja ai n-gang pipe ni hpe hkam sha ai gaw grau htap htuk ai, shaning 20 jan na hka htung hka hpe hkam sharang lu ai asak hkrung lam gaw grau htap htuk ai.
Hpa majaw nga yang, n-gun atsam hte n-gun kaba ai n-gun hpe n-gun jaw ai lam ni a matu, nbung n-gun n-gun n-gun n-gun ni (sh) ceramic n-gun dat ni, ceramic coatings (sh) high{2}} a n-gun n-gun n-gun n-gun (300℃hta jan ai n-gun ni hpe hkam sharang lu ai atsam nga ai ) hpe hpaji jaw ai, n-gun n-gun hpe ninghkap lu ai atsam hte nbung n-gun shayawm ai lam lahkawng yan hpe jaw ya ai.
Special media: Acid hte alkaline ntsin ni hpe htaw sa ai shaloi (sulfuric acid hte lye zawn re ai), polytetrafuric acid (PTFE){0}}}lined steel pipe ra ai. Shi a chemical inertness gaw grai n-gun ja ai ntsin yawng hpe hkam sharang lu shangun ai.
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Anti{0}}corrosion steel pipe ni hpe lang ai a sut masa akyu ni gaw ahkyak ai. Ordinary steel pipe ni hpe n-gun ja ai makau grup yin hta 3{3}}5 ning shagu galai ra na re, n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-rawng ai steel pipe ni gaw 20{11}50 ning (ga shadawn, 3PE anti-corrorosion lup makoi ai pipeline ni hpe 50 ning tup asak hkrung lam a matu galaw da ai). Ga shadawn, n-gun n-gun n-rawng ai hte hka lim ai majaw byin pru wa ai shingra wan n-gun pipeline kapaw ai lam gaw, wan hku law ai yuan ni a sut masa sum mat chye ai. Raitim, n-gun shayawm ai n-gang pipe ni hta bang ai gumhpraw gaw, pipeline yawng a manu hta na 5%-15% sha rai nga ai, rai tim, hkala nba byin wa na masa hpe 90% jan shayawm ya lu ai.
Dai hta n-ga, anti-corrosion steel pipe ni gaw hpun hpraw hte npu n-gun n-gun hpe n-gun jaw ya ai. Corrosion gaw pipeline a n-gun hpe shayawm ya ai (ga shadawn, scaling gaw ninghkap ai lam hpe jat ya ai), anti{3}}corrosion tsi lajang ai gaw n-gun n-gun yawm ai hpe shayawm ya lu ai. Magam bungli prat hpe jat ya ai gaw, kabai kau ai n-gang pipe ni a grup yin hpe hkra machyi ai lam hpe shayawm ya ai.
Ngut nna tsun ga: "N mu lu ai Guardian" ngu ai gaw, hpaga lam a prat hpe makawp maga ya ai
Dai majaw, n-gun ja ai West{0}}East Gas Pipeline network kaw nna, panglai hkin-gau kata na hka htung ni hpe garan gachyan ai ladat ni kaw nna, polar sawk sagawn dap ni a n-gun atsam pipeline ni du hkra, anti{1}corrosion steel pipe ni gaw, dai ni na aten na hpaga lam a shimlum lam hte n-gun atsam hpe atsin sha makawp maga ya ai. Arung arai ni a hpaji masa hte anti{3}corrosion hpaji masa rawt jat wa ai hte maren (nano-coatings hpe rawt jat wa ai hte hpaji rawng ai hku yu reng ai anti{5}corrosion layers), htawm hpang na anti{6}}corrosion steel pipe ni gaw grau hpaji rawng ai hte grau ngang grin na re, mungkan ting na n-gun atsam hte npawt nhpang gawgap lam ni hta makawp maga na matu ngang kang ai npawt nhpang langai hku nna matut nna galaw sa wa na re.
