{"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":"kuidas-tuvastada-ja-eemaldada-punktsioonikorrosiooni","status":"publish","type":"post","link":"https:\/\/vm6fr4whzn6.c.updraftclone.com\/et\/2022\/02\/28\/kuidas-tuvastada-ja-eemaldada-punktsioonikorrosiooni\/","title":{"rendered":"Kuidas tuvastada ja eemaldada korrosiooniplekke"},"content":{"rendered":"<p>Korrosioon on igasuguste metallide vaenlane. See kahjustav protsess p\u00f5hjustab metallmaterjalide j\u00e4rkj\u00e4rgulist roostetamist ja lagunemist ning sageli r\u00fcndab see salakavalalt, m\u00e4rkamatult, kuni kahju on juba tekkinud.<\/p>\n<p>Korrosiooni on veelgi raskem avastada ja ennetada, sest seda esineb mitmes vormis. \u00dcks neist on punktsioonikorrosioon, mida peetakse \u00fcheks k\u00f5ige salakavalamaks ja kahjulikumaks korrosioonivormiks. Pittingkorrosioon v\u00f5ib moonutada metallpindu ja kahjustada nende stabiilsust.<\/p>\n<p>Selles juhendis anname l\u00fchi\u00fclevaate punktsioonikorrosioonist, selle toimimisest ja p\u00f5hjustest. Samuti vaatleme, kuidas tuvastada ja k\u00f5rvaldada punktsioonikorrosiooni. Lugege edasi, et saada rohkem teavet selle ainulaadse korrosiooni vormi kohta ja selle kohta, kuidas v\u00e4ltida selle h\u00e4vitamist teie metalltorude ja muude komponentide puhul.<\/p>\n<h2>Mis on punktsioonikorrosioon?<\/h2>\n<p>Pitting korrosioon, mida tuntakse lihtsamalt kui pitting, on \u00fcks t\u00fc\u00fcpi <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/et\/2021\/06\/15\/mida-saab-teha-kohaliku-korrosiooni-vastu\/'>lokaalne korrosioon<\/a> mis m\u00f5jutab alumiiniumi, rauda, terast ja muid metallilisi materjale. Seda iseloomustavad roostega kaetud \u00f5\u00f5nsused ehk augud, mida see j\u00e4tab materjali pinnale. Kui seda ei kontrollita, v\u00f5ib punktsioonikorrosioon kahjustada materjali j\u00e4\u00e4davalt ja \u00f5hendada metalli, mis viib konstruktsiooni terviklikkuse h\u00e4vitamiseni.<\/p>\n<h2>Mis p\u00f5hjustab punktsioonikorrosiooni?<\/h2>\n<p>K\u00f5ige sagedamini tekib punktsioonikorrosioon v\u00e4ikese ala depassiveerumise t\u00f5ttu. See v\u00e4ike ala muutub anoodiks, samas kui \u00fcmbritsev ala muutub katoodiks. See toob kaasa kohaliku korrosiooni.<\/p>\n<p>Kuid mis p\u00f5hjustab depassivatsiooni \u00fcldse? V\u00e4ikesed defektid, nagu praod, laastud ja kriimustused! V\u00e4ikesed kriimustused metalli pinnal ei pruugi tunduda suure ohuna, kuid need pisikesed kriimustused v\u00f5ivad kahjustada metalli kaitsekihti ja muuta selle passiivsuse olematuks. K\u00f5ige levinumad punktsioonikorrosiooni p\u00f5hjused on j\u00e4rgmised:<\/p>\n<ul>\n<li>Praod<\/li>\n<li>Kriimustused<\/li>\n<li>Chips<\/li>\n<li>Eba\u00fchtlane pinge<\/li>\n<li>Defektne metallsubstraat<\/li>\n<li>Kokkupuude turbulentse vedelikuga<\/li>\n<li>Eba\u00fchtlane kaitsekate<\/li>\n<li>Keemiar\u00fcnnakud<\/li>\n<\/ul>\n<p>Seega, kui teie metall on mingil viisil kahjustatud v\u00f5i puutub kokku heitliku veega, j\u00e4lgige t\u00e4helepanelikult, et ei tekiks punkthaavu. Teine v\u00f5imalik punktsiooni tekkep\u00f5hjus on diferentseeritud \u00f5hutamine. Kui halvasti hooldatud metall puutub kokku vee v\u00f5i tolmuosakestega, muutub v\u00e4ike ala hapetuks. See p\u00f5hjustab selle ja \u00fcmbritseva ala erineva \u00f5hustatuse. Tekib reaktsioon ja metallipinnale tekivad roosteplekid.<\/p>\n<h2>Kuidas tuvastada korrosiooni<\/h2>\n<p>Paljud peavad punktsioonikorrosiooni \u00fcheks k\u00f5ige ohtlikumaks korrosioonivormiks, sest seda on raske ennustada, avastada ja ennetada. Te v\u00f5ite m\u00f5elda: \"Oot, kuna see tekitab metallipinnale augud, kas seda ei peaks olema lihtne avastada?\". Kahjuks on korrosiooni tekitatud augud uskumatult v\u00e4ikesed. Enamik neist on inimsilmale n\u00e4htamatud (v\u00f5i peaaegu n\u00e4htamatud). Samuti on need tavaliselt kaetud korrosioonikihiga, mis muudab nende m\u00e4rkamise veelgi keerulisemaks.<\/p>\n<p>Kuigi korrosiooni avastamine palja silmaga on peaaegu v\u00f5imatu, on olemas\u00a0<em>on<\/em>\u00a0usaldusv\u00e4\u00e4rsed viisid selle testimiseks. Katsetamine v\u00f5ib takistada punktsiooni tekkimist, seega soovitame tundlikke materjale sageli katsetada. Levinud katsemeetodid punktsioonikorrosiooni tuvastamiseks on j\u00e4rgmised:<\/p>\n<h3>Visuaalne uurimine<\/h3>\n<p>Kasutades mikroskoopi, loeb spetsialist antud piirkonnas olevate aukude arvu. See aitab neil m\u00e4\u00e4rata nende suurust ja jaotumist ning intensiivsust.<\/p>\n<h3>Soonika testimine<\/h3>\n<p>Helikatsete k\u00e4igus edastatakse ultraheli energia l\u00e4bi muhvi metallile. Need ultraheliimpulsid p\u00f5rkuvad metallilt ja muundatakse elektrilisteks signaalideks. Need signaalid n\u00e4itavad metallil olevate s\u00fcvendite ja muude defektide asukohta.<\/p>\n<h3>Elektromagnetiline testimine<\/h3>\n<p>Seda katsemeetodit kasutatakse juhtivate metallide, n\u00e4iteks terase ja raua pinnal esinevate ebatasasuste tuvastamiseks.<\/p>\n<h3>Elektrokeemiline testimine<\/h3>\n<p>Elektrokeemilised katsed on teine viis metallide korrosiooni kiiruse kontrollimiseks. Katse k\u00e4igus rakendatakse metalli t\u00f6\u00f6elektroodile elektrivoolu, et tekitada m\u00f5\u00f5detavaid signaale.<\/p>\n<h3>Sukeldumiskatse<\/h3>\n<p>Metallit\u00fckk kastetakse lahusesse. See j\u00e4etakse paariks p\u00e4evaks seisma. P\u00e4rast eemaldamist m\u00f5\u00f5detakse korrosiooni kiirus ja uuritakse augud mikroskoobi all, et m\u00e4\u00e4rata t\u00e4psemalt ulatus ja intensiivsus.<\/p>\n<h2>Millised materjalid on k\u00f5ige enam ohustatud?<\/h2>\n<p>Bromiid-, kloriid- v\u00f5i h\u00fcpokloriidiioone sisaldavad materjalid on k\u00f5ige vastuv\u00f5tlikumad punktsioonikorrosioonile. Fluoriide v\u00f5i jodiite sisaldavate lahustega (nagu vesi v\u00f5i sulfiidid) kokkupuutuvad materjalid on samuti k\u00f5rgendatud ohus. M\u00f5ned metallid, mis kalduvad punktsioonikorrosioonile, on j\u00e4rgmised:<\/p>\n<ul>\n<li>Kroom<\/li>\n<li>Roostevaba teras<\/li>\n<li>Elavh\u00f5be<\/li>\n<li>Kobalt<\/li>\n<li>Alumiinium<\/li>\n<li>Vask<\/li>\n<\/ul>\n<h2>Pragude korrosiooni v\u00e4ltimine<\/h2>\n<p>Lisaks sellele, et te teate, kuidas tuvastada ja eemaldada punktsioonikorrosiooni, tahate eeldatavasti teada, kuidas seda \u00fcldse v\u00e4ltida. On m\u00f5ned viisid, kuidas minimeerida punktsioonikorrosiooni ohtu.<\/p>\n<p>Korrosioonikindlate materjalide kasutamine on \u00fcks esimesi ennetavaid meetmeid. Titaani, l\u00e4mmastikku, kroomi ja mol\u00fcbdeeni sisaldavad sulamid peavad h\u00e4sti vastu punktsioonile. Teine t\u00f5hus ennetusmeetod on <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/et\/konsultatsioonivaldkonnad\/korrosioon\/katoodilise-kaitse-potentsiaali-uuringud\/katoodilise-kaitse-haired\/'>katoodiline kaitse,<\/a> mis takistab korrosiooni, muutes metallipinna elektrokeemiliseks elemendiks. Ideaalis tuleks materjal katta reaktiivsema metalliga. See s\u00f6\u00f6vitav metall toimib anoodina ja korrodeerub algse metalli asemel, takistades punktsiooni tekkimist.<\/p>\n<p>Teine k\u00f5ige t\u00f5husam viis punktsioonikorrosiooni v\u00e4ltimiseks on keskkonnategurite (niiskus, temperatuur, kloriidid, pH-happed ja soolade tase) v\u00f5imalikult suures ulatuses kontrollimine. Teised meetodid punktsioonikorrosiooni v\u00e4ltimiseks h\u00f5lmavad kaitsekatte kasutamist ja hooldamist ning vedeliku ja tolmu kokkupuute kontrollimist.<\/p>\n<h2>Kas te saate eemaldada korrosiooni?<\/h2>\n<p>Teil v\u00f5ib olla hea meel kuulda, et erinevalt enamikust korrosioonivormidest on punktsioonikorrosioon eemaldatav. Eeldusel, et metall on struktuuriliselt veel terve, saate korrosiooni eemaldada \u00f5rna happega. Kui soovite eemaldada tegeliku punktsioonikorrosiooni, peate metalli lihvima, kraapima v\u00f5i liivapritsiga puhastama. Pittinguid saab eemaldada ka mehaaniliselt.<\/p>\n<p>Kui korrosioon ja punktsioon on kadunud, tahate metalli kruntida, kasutades \u00fchte j\u00e4rgmistest katmismeetoditest:<\/p>\n<ul>\n<li>Tsinkfosfaat kruntimine<\/li>\n<li>Tsingipritsmetallidamine<\/li>\n<li>Keemiline pinnakate<\/li>\n<li>Kuumalt kastmine<\/li>\n<\/ul>\n<p>Otsite viise, kuidas hoida korrosiooni eemal? Dreiym Engineeringi eksperdid v\u00f5ivad aidata! Me pakume\u00a0<a href=\"https:\/\/vm6fr4whzn6.c.updraftclone.com\/et\/services\/korrosioon\/pinnase-soovitavuse-analuus\/\"><strong>pinnase s\u00f6\u00f6vitavuse testimine<\/strong><\/a>\u00a0et m\u00f5\u00f5ta pinnase s\u00f6\u00f6vitavust, millesse teie metallosad on maetud. Samuti <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/et\/konsultatsioonivaldkonnad\/korrosioon\/katoodilise-kaitse-projekteerimine\/'>projekteerida ja paigaldada katoodilist kaitset<\/a> s\u00fcsteemid, et veelgi v\u00e4hendada punktsiooniohtu. V\u00f5tke meiega juba t\u00e4na \u00fchendust, et saada rohkem teavet meie korrosiooniennetusteenuste kohta v\u00f5i leppida kokku konsultatsioon.<\/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=\"Kuidas tuvastada ja eemaldada korrosiooniplekke\" 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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