{"id":3053,"date":"2022-02-28T06:55:52","date_gmt":"2022-02-28T06:55:52","guid":{"rendered":"https:\/\/3.212.105.250\/?p=3053"},"modified":"2025-01-17T18:04:35","modified_gmt":"2025-01-18T00:04:35","slug":"sut-i-adnabod-a-chael-gwared-ar-gyrydiad-pwll","status":"publish","type":"post","link":"https:\/\/vm6fr4whzn6.c.updraftclone.com\/cy\/2022\/02\/28\/sut-i-adnabod-a-chael-gwared-ar-gyrydiad-pwll\/","title":{"rendered":"Sut i Adnabod a Dileu Cyrydiad Pitting"},"content":{"rendered":"<p>Mae cyrydiad yn elyn i fetelau o bob math. Mae&#039;r broses niweidiol hon yn achosi i ddeunyddiau metel rydu a diraddio&#039;n raddol; ac yn aml, mae&#039;n ymosod yn ddirgel, heb fod yn ganfyddadwy nes bod y difrod eisoes wedi&#039;i wneud.<\/p>\n<p>Yr hyn sy&#039;n gwneud cyrydiad hyd yn oed yn anoddach i&#039;w ganfod a&#039;i atal yw ei fod yn dod mewn sawl ffurf. Un o&#039;r rhain yw cyrydiad twll, a ystyrir yn un o&#039;r ffurfiau mwyaf slei a niweidiol o gyrydiad. Gall cyrydiad twll anffurfio arwynebau metel yn ogystal \u00e2 pheryglu eu sefydlogrwydd.<\/p>\n<p>Yn y canllaw hwn, byddwn yn rhoi trosolwg byr o gyrydiad twll, beth mae&#039;n ei wneud, a beth sy&#039;n ei achosi. Byddwn hefyd yn trafod sut i adnabod a chael gwared ar gyrydiad twll. Darllenwch ymlaen i ddysgu mwy am y math unigryw hwn o gyrydiad a sut i&#039;w atal rhag dinistrio&#039;ch pibellau metel a chydrannau eraill.<\/p>\n<h2>Beth yw cyrydiad pwll?<\/h2>\n<p>Mae cyrydiad tyllau, a elwir yn fwy syml fel tyllau, yn fath o <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/cy\/2021\/06\/15\/beth-allwch-chi-ei-wneud-am-gyrydiad-lleol\/'>cyrydiad lleol<\/a> sy&#039;n effeithio ar alwminiwm, haearn, dur, a deunyddiau metel eraill. Fe&#039;i nodweddir gan y ceudodau, neu&#039;r pyllau, sydd wedi&#039;u gorchuddio \u00e2 rhwd, y mae&#039;n eu gadael ar wyneb y deunydd. Pan na chaiff ei wirio, gall cyrydiad tyllau ddifetha&#039;r deunydd yn barhaol a theneuo&#039;r metel, gan arwain at golled ddinistriol o gyfanrwydd strwythurol.<\/p>\n<h2>Beth sy&#039;n Achosi Cyrydiad Pyllau?<\/h2>\n<p>Yn fwyaf cyffredin, mae cyrydiad twll yn digwydd oherwydd dad-oddefgaru ardal fach. Mae&#039;r ardal fach hon yn dod yn anodig, tra bod yr ardal o&#039;i chwmpas yn dod yn gatod. Mae hyn yn arwain at gyrydiad lleol.<\/p>\n<p>Ond beth sy&#039;n achosi dad-goddefedd yn y lle cyntaf? Diffygion bach, fel craciau, sglodion a chrafiadau! Efallai na fydd crafiadau bach ar wyneb y metel yn ymddangos fel llawer o fygythiad, ond gall y crafiadau bach hyn niweidio haen amddiffynnol y metel a negyddu ei oddefedd. Ymhlith yr achosion mwyaf cyffredin o gyrydiad twll mae:<\/p>\n<ul>\n<li>Craciau<\/li>\n<li>Crafiadau<\/li>\n<li>Sglodion<\/li>\n<li>Straen anghyfartal<\/li>\n<li>Swbstrad metel diffygiol<\/li>\n<li>Amlygiad i hylif cythryblus<\/li>\n<li>Gorchudd amddiffynnol anghyfartal<\/li>\n<li>Ymosodiadau cemegol<\/li>\n<\/ul>\n<p>Felly, os yw eich metel wedi&#039;i ddifrodi mewn unrhyw ffordd neu wedi&#039;i amlygu i ddyfroedd garw, cadwch lygad barcud am dyllau. Achos posibl arall o dyllau yw awyru gwahaniaethol. Pan fydd metel sydd wedi&#039;i gynnal a&#039;i gadw&#039;n wael yn agored i dd\u0175r neu ronynnau llwch, mae ardal fach yn cael ei dad-ocsigenu. Mae hyn yn achosi gwahaniaeth mewn awyru rhyngddo a&#039;r ardal gyfagos. Mae adwaith yn digwydd, ac mae pyllau rhydlyd yn ffurfio ar wyneb y metel.<\/p>\n<h2>Sut i Adnabod Cyrydiad Pitting<\/h2>\n<p>Mae llawer yn ystyried cyrydiad tyllau yn un o&#039;r ffurfiau mwyaf peryglus o gyrydiad oherwydd pa mor anodd yw ei ragweld, ei ganfod a&#039;i atal. Efallai y byddwch chi&#039;n meddwl, &quot;Arhoswch, gan ei fod yn creu tyllau ar wyneb y metel, oni ddylai fod yn hawdd ei ganfod?&quot; Yn anffodus, mae&#039;r tyllau y mae&#039;n eu creu yn anhygoel o fach. Mae&#039;r rhan fwyaf yn anweledig (neu bron yn anweledig) i&#039;r llygad dynol. Maent hefyd yn aml wedi&#039;u gorchuddio \u00e2 haen o gyrydiad, sy&#039;n eu gwneud hyd yn oed yn anoddach i&#039;w gweld.<\/p>\n<p>Er bod gweld cyrydiad twll gyda&#039;r llygad noeth bron yn amhosibl, mae\u00a0<em>yw<\/em>\u00a0ffyrdd dibynadwy o brofi amdano. Gall profi atal cyrydiad twll rhag achosi anhrefn, felly rydym yn argymell profi deunyddiau sy&#039;n agored i niwed yn aml. Mae dulliau profi cyffredin ar gyfer cyrydiad twll yn cynnwys:<\/p>\n<h3>Archwiliad Gweledol<\/h3>\n<p>Gan ddefnyddio microsgop, bydd gweithiwr proffesiynol yn cyfrif nifer y pyllau mewn ardal benodol. Mae hyn yn eu helpu i bennu eu maint a&#039;u dosbarthiad yn ogystal \u00e2&#039;u dwyster.<\/p>\n<h3>Profi Sonig<\/h3>\n<p>Yn ystod profion sonig, mae egni sain uwchsonig yn cael ei drosglwyddo trwy gyplunydd i&#039;r metel. Mae&#039;r pylsau uwchsonig hyn yn bownsio o&#039;r metel ac yn cael eu trosi&#039;n signalau trydanol. Bydd y signalau hyn yn dangos lleoliad pyllau ac amherffeithrwydd eraill yn y metel.<\/p>\n<h3>Profi Electromagnetig<\/h3>\n<p>Defnyddir y dull profi hwn i leoli anghysondebau yn wyneb metelau dargludol fel dur a haearn.<\/p>\n<h3>Profi Electrogemegol<\/h3>\n<p>Mae profion electrocemegol yn ffordd arall o brofi cyfradd cyrydiad mewn metelau. Yn ystod y prawf, rhoddir cerrynt trydanol ar electrod gweithio&#039;r metel i greu signalau mesuradwy.<\/p>\n<h3>Prawf Trochi<\/h3>\n<p>Mae darn o&#039;r metel yn cael ei drochi mewn toddiant. Mae&#039;n cael ei adael i eistedd am ychydig ddyddiau. Ar \u00f4l ei dynnu, mesurir cyfradd y cyrydiad ac archwilir y pyllau o dan ficrosgop i bennu cwmpas a dwyster ymhellach.<\/p>\n<h2>Pa Ddeunyddiau Sydd Mewn Mwyaf o Risg?<\/h2>\n<p>Deunyddiau sy&#039;n cynnwys \u00efonau bromid, clorid, neu hypoclorit yw&#039;r rhai mwyaf agored i gyrydiad twll. Mae deunyddiau sy&#039;n agored i doddiannau sy&#039;n cynnwys fflworidau neu \u00efoditau (fel d\u0175r neu sylffidau) hefyd mewn mwy o berygl. Dyma rai metelau sy&#039;n dueddol o gael twll:<\/p>\n<ul>\n<li>Cromiwm<\/li>\n<li>Dur di-staen<\/li>\n<li>Mercwri<\/li>\n<li>Cobalt<\/li>\n<li>Alwminiwm<\/li>\n<li>Copr<\/li>\n<\/ul>\n<h2>Atal Cyrydiad Holltau<\/h2>\n<p>Yn ogystal \u00e2 gwybod sut i adnabod a chael gwared ar gyrydiad twll, mae&#039;n debyg eich bod chi eisiau gwybod sut i atal twll yn y lle cyntaf. Mae yna ychydig o ffyrdd i leihau&#039;r risg o dwll.<\/p>\n<p>Mae defnyddio deunyddiau sy&#039;n gwrthsefyll cyrydiad yn un o&#039;r mesurau ataliol cyntaf i&#039;w cymryd. Mae aloion sy&#039;n cynnwys titaniwm, nitrogen, cromiwm, a molybdenwm yn gwrthsefyll tyllau&#039;n dda. Dull atal effeithiol arall yw <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/cy\/meysydd-ymgynghori\/cyrydiad\/arolygon-potensial-amddiffyn-cathodig\/ymyrraeth-amddiffyn-cathodig\/'>amddiffyniad cathodig,<\/a> sy&#039;n atal cyrydiad trwy droi arwyneb metel yn gell electrogemegol. Yn ddelfrydol, dylech orchuddio&#039;r deunydd \u00e2 metel mwy adweithiol. Bydd y metel cyrydol hwn yn gweithredu fel anod ac yn cyrydu yn lle&#039;r metel gwreiddiol, gan atal pytio.<\/p>\n<p>Un arall o&#039;r ffyrdd mwyaf effeithiol o atal cyrydiad twll yw rheoli ffactorau amgylcheddol (lleithder, tymheredd, clorid, pH asidau, a lefelau halen) hyd eithaf eich gallu. Mae dulliau eraill ar gyfer atal twll yn cynnwys defnyddio a chynnal haen amddiffynnol a rheoli amlygiad i hylif a llwch.<\/p>\n<h2>Allwch chi gael gwared ar gyrydiad pwll?<\/h2>\n<p>Efallai y byddwch chi&#039;n falch o glywed, yn wahanol i&#039;r rhan fwyaf o ffurfiau o gyrydiad, bod cyrydiad twll yn symudadwy. Gan dybio bod y metel yn dal yn gadarn yn strwythurol, gallwch chi gael gwared ar y cyrydiad gydag asid ysgafn. Os ydych chi am gael gwared ar y twll gwirioneddol, bydd angen i chi dywodio, crafu neu chwythu&#039;r metel \u00e2 thywod. Gallwch chi hefyd gael gwared ar y twll yn fecanyddol.<\/p>\n<p>Unwaith y bydd y cyrydiad a&#039;r twll wedi diflannu, byddwch chi eisiau rhoi preim ar y metel gan ddefnyddio un o&#039;r dulliau cotio canlynol:<\/p>\n<ul>\n<li>Preimio sinc ffosffad<\/li>\n<li>Metelio chwistrellu sinc<\/li>\n<li>Gorchudd cemegol<\/li>\n<li>Trochi poeth<\/li>\n<\/ul>\n<p>Chwilio am ffyrdd o atal cyrydiad twll? Gall yr arbenigwyr yn Dreiym Engineering eich helpu! Rydym yn cynnig\u00a0<a href=\"https:\/\/vm6fr4whzn6.c.updraftclone.com\/cy\/services\/cyrydiad\/dadansoddiad-cyrydiad-pridd\/\"><strong>profi cyrydiad pridd<\/strong><\/a>\u00a0i fesur cyrydedd y pridd y mae eich cydrannau metel wedi&#039;u claddu ynddo. Rydym hefyd <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/cy\/meysydd-ymgynghori\/cyrydiad\/dyluniad-amddiffyn-cathodig\/'>dylunio a gosod amddiffyniad cathodig<\/a> systemau i leihau&#039;r risg o dyllu ymhellach. Cysylltwch \u00e2 ni heddiw i ddysgu mwy am ein gwasanaethau atal cyrydiad neu i drefnu ymgynghoriad.<\/p>\n<img decoding=\"async\" class=\"aligncenter wp-image-3938 size-full\" src=\"https:\/\/vm6fr4whzn6.c.updraftclone.com\/wp-content\/uploads\/2022\/02\/Remove-Pitting-Corrosion.jpg\" alt=\"Sut i Adnabod a Dileu Cyrydiad Pitting\" width=\"800\" height=\"2000\" srcset=\"https:\/\/vm6fr4whzn6.c.updraftclone.com\/wp-content\/uploads\/2022\/02\/Remove-Pitting-Corrosion.jpg 800w, https:\/\/vm6fr4whzn6.c.updraftclone.com\/wp-content\/uploads\/2022\/02\/Remove-Pitting-Corrosion-120x300.jpg 120w, https:\/\/vm6fr4whzn6.c.updraftclone.com\/wp-content\/uploads\/2022\/02\/Remove-Pitting-Corrosion-768x1920.jpg 768w, https:\/\/vm6fr4whzn6.c.updraftclone.com\/wp-content\/uploads\/2022\/02\/Remove-Pitting-Corrosion-614x1536.jpg 614w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>","protected":false},"excerpt":{"rendered":"<p>Corrosion is the enemy of metals of all kinds. This damaging process causes metal materials to gradually rust and degrade; and often, it attacks sneakily, undetectable until the damage is already done. What makes corrosion even harder to detect and prevent is that it comes in many forms. One of these is pitting corrosion, regarded [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":3453,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_mbp_gutenberg_autopost":false,"_pgmb_is_evergreen":true,"_pgmb_ap_template_id":0,"iawp_total_views":602,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-3053","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-corrosion-and-cathodic-protection"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.6.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"Corrosion is the enemy of metals of all kinds. 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