{"id":11898,"date":"2025-08-18T01:57:11","date_gmt":"2025-08-18T01:57:11","guid":{"rendered":"https:\/\/sinoextrud.com\/?p=11898"},"modified":"2025-08-18T01:57:11","modified_gmt":"2025-08-18T01:57:11","slug":"nerezavi-hlinik","status":"publish","type":"post","link":"https:\/\/sinoextrud.com\/cs\/does-aluminum-rust\/","title":{"rendered":"Rezav\u00ed hlin\u00edk?"},"content":{"rendered":"

\"porovn\u00e1n\u00ed
Hlin\u00edk nerezav\u00ed - jeho oxidov\u00e1 vrstva ho chr\u00e1n\u00ed p\u0159ed koroz\u00ed.<\/figcaption><\/figure>\n<\/p>\n

Nechali jste venku kovov\u00fd n\u00e1stroj - zhn\u011bdl a odlupoval se. Ale v\u00e1\u0161 hlin\u00edkov\u00fd \u017eeb\u0159\u00edk? St\u00e1le leskl\u00fd. Tak\u017ee hlin\u00edk rezav\u00ed?<\/p>\n

Hlin\u00edk nerezav\u00ed jako \u017eelezo. M\u00edsto toho vytv\u00e1\u0159\u00ed ochrannou vrstvu oxidu, kter\u00e1 odol\u00e1v\u00e1 korozi a zabra\u0148uje po\u0161kozen\u00ed konstrukce.<\/strong><\/p>\n

To je jeden z d\u016fvod\u016f, pro\u010d je hlin\u00edk \u0161pi\u010dkovou volbou v architektu\u0159e, doprav\u011b a venkovn\u00edch v\u00fdrobc\u00edch.<\/p>\n

Co je to rez a tvo\u0159\u00ed ji hlin\u00edk?<\/h2>\n

Ne ka\u017ed\u00e1 koroze je stejn\u00e1. Koroze je specifick\u00e1 pro ur\u010dit\u00e9 kovy - p\u0159edev\u0161\u00edm pro \u017eelezo.<\/p>\n

Rez je \u010dervenohn\u011bd\u00fd vlo\u010dkovit\u00fd oxid (Fe-o?-nh-o), kter\u00fd vznik\u00e1 reakc\u00ed \u017eeleza s kysl\u00edkem a vodou. Hlin\u00edk nerezav\u00ed, proto\u017ee neobsahuje \u017eelezo.<\/strong><\/p>\n

\"Koncepce
Hlin\u00edk vytv\u00e1\u0159\u00ed m\u00edsto odlupuj\u00edc\u00ed se rzi samoregenera\u010dn\u00ed vrstvu oxidu.<\/figcaption><\/figure>\n<\/p>\n

Rez vs. oxidace<\/h3>\n
    \n
  • Rust<\/strong> je forma oxid \u017eelezit\u00fd<\/strong> kter\u00e1 se vyskytuje u vody a vzduchu.<\/li>\n
  • Oxid hlinit\u00fd (Al-o?)<\/strong> vznik\u00e1 okam\u017eit\u011b, kdy\u017e je hlin\u00edk vystaven p\u016fsoben\u00ed vzduchu.<\/li>\n<\/ul>\n

    Na rozd\u00edl od rzi, kter\u00e1 se odlupuje a oslabuje kov, oxid hlinit\u00fd pevn\u011b dr\u017e\u00ed<\/strong> a chr\u00e1n\u00ed povrch.<\/p>\n

    Pro\u010d na tom z\u00e1le\u017e\u00ed<\/h3>\n

    Rez roze\u017e\u00edr\u00e1 ocel. Kv\u016fli n\u00ed se rozpadaj\u00ed mosty a prask\u00e1 potrub\u00ed. Ale oxidov\u00e1 vrstva hlin\u00edku funguje jako \u0161t\u00edt. Zabra\u0148uje hlubok\u00e9 korozi a udr\u017euje kov pevn\u00fd.<\/p>\n\n\n\n\n\n\n\n\n
    Funkce<\/th>\nRez (oxid \u017eelezit\u00fd)<\/th>\nOxid hlinit\u00fd<\/th>\n<\/tr>\n<\/thead>\n
    Barva<\/td>\n\u010cerven\u00e1\/hn\u011bd\u00e1<\/td>\nB\u00edl\u00e1\/st\u0159\u00edbrn\u00e1<\/td>\n<\/tr>\n
    Struktura<\/td>\nVlo\u010dkovit\u00fd, slab\u00fd<\/td>\nPevn\u00e9, t\u011bsn\u00e9 spojen\u00ed<\/td>\n<\/tr>\n
    Dopad na kov<\/td>\n\u0160kody v pr\u016fb\u011bhu \u010dasu<\/td>\nChr\u00e1n\u00ed p\u0159ed koroz\u00ed<\/td>\n<\/tr>\n
    Schopnost reformace<\/td>\nNe<\/td>\nNeust\u00e1l\u00e9 samoopravov\u00e1n\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    <\/svg> Rez se tvo\u0159\u00ed na ka\u017ed\u00e9m kovu vystaven\u00e9m p\u016fsoben\u00ed vzduchu a vody.<\/b>False<\/span><\/p>

    Rez se vztahuje konkr\u00e9tn\u011b na oxid \u017eelezit\u00fd; rezav\u011bt mohou pouze kovy obsahuj\u00edc\u00ed \u017eelezo.<\/p><\/div>
    \n

    <\/svg> Hlin\u00edk nerezav\u00ed, proto\u017ee neobsahuje \u017eelezo a tvo\u0159\u00ed oxid hlinit\u00fd.<\/b>Pravda<\/span><\/p>

    Hlin\u00edk reaguje jinak, vytv\u00e1\u0159\u00ed ochrannou vrstvu oxidu, nikoli rez.<\/p><\/div><\/p>\n

    Jak oxiduje hlin\u00edk ve srovn\u00e1n\u00ed se \u017eelezem?<\/h2>\n

    Oxidace zn\u00ed na prvn\u00ed pohled \u0161patn\u011b. Ale pro hlin\u00edk je to vlastn\u011b dobr\u00e1 v\u011bc.<\/p>\n

    Hlin\u00edk rychle oxiduje a vytv\u00e1\u0159\u00ed tenkou stabiln\u00ed vrstvu oxidu hlinit\u00e9ho, kter\u00e1 br\u00e1n\u00ed dal\u0161\u00ed korozi - na rozd\u00edl od \u017eeleza, kter\u00e9 rezav\u00ed st\u00e1le hloub\u011bji.<\/strong><\/p>\n

    \"eloxovan\u00fd
    eloxov\u00e1n\u00ed zvy\u0161uje odolnost proti korozi zes\u00edlen\u00edm vrstvy oxidu.<\/figcaption><\/figure>\n<\/p>\n

    Oxidace \u017eeleza<\/h3>\n

    Jakmile \u017eelezo za\u010dne rezav\u011bt, pokra\u010duje v korozi. Voda a kysl\u00edk pronikaj\u00ed do \u0161upinat\u00e9 rzi a dost\u00e1vaj\u00ed se do hlub\u0161\u00edch vrstev. Postupem \u010dasu se \u017eelezo rozpad\u00e1.<\/p>\n

    Oxidace hlin\u00edku<\/h3>\n

    P\u0159i styku hlin\u00edku se vzduchem se vytvo\u0159\u00ed vrstva oxidu hlinit\u00e9ho. okam\u017eit\u011b<\/strong>-tlou\u0161\u0165ka jen n\u011bkolik nanometr\u016f. Tento pasivn\u00ed vrstva<\/strong> ut\u011bsn\u00ed povrch a zabr\u00e1n\u00ed pronik\u00e1n\u00ed vlhkosti nebo chemik\u00e1li\u00ed na hol\u00fd kov.<\/p>\n

    Je samouzdravuj\u00edc\u00ed. Kdy\u017e ho po\u0161kr\u00e1bete, b\u011bhem n\u011bkolika sekund se obnov\u00ed.<\/p>\n\n\n\n\n\n\n
    Kov<\/th>\nTvorba oxid\u016f<\/th>\nKorozn\u00ed \u00fa\u010dinek<\/th>\nOchrann\u00e1 vrstva<\/th>\n<\/tr>\n<\/thead>\n
    Iron<\/td>\nPomal\u00e9, pr\u016fb\u011b\u017en\u00e9<\/td>\nOslabuje kov<\/td>\nNe<\/td>\n<\/tr>\n
    Hlin\u00edk<\/td>\nOkam\u017eit\u00e9, stabiln\u00ed<\/td>\nZabra\u0148uje hlub\u0161\u00edmu po\u0161kozen\u00ed<\/td>\nAno<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Vzhled povrchu<\/h3>\n
      \n
    • \u017delezn\u00e1 rez je viditeln\u00e1 a hrub\u00e1.<\/li>\n
    • Oxidace hlin\u00edku se \u010dasto projevuje jako matn\u00fd \u0161ed\u00fd film, kter\u00fd nen\u00ed v\u017edy patrn\u00fd.<\/li>\n<\/ul>\n

      <\/svg> Okam\u017eit\u011b se vytvo\u0159\u00ed oxid hlinit\u00fd, kter\u00fd br\u00e1n\u00ed dal\u0161\u00ed oxidaci.<\/b>Pravda<\/span><\/p>

      Tato ochrann\u00e1 vrstva chr\u00e1n\u00ed povrch p\u0159ed vzduchem a vlhkost\u00ed.<\/p><\/div>
      \n

      <\/svg> \u017delezo i hlin\u00edk rezav\u00ed stejn\u00fdm zp\u016fsobem.<\/b>False<\/span><\/p>

      Pouze \u017eelezo tvo\u0159\u00ed rez, hlin\u00edk tvo\u0159\u00ed jin\u00fd, ochrann\u00fd oxid.<\/p><\/div><\/p>\n

      Pro\u010d hlin\u00edk odol\u00e1v\u00e1 korozi?<\/h2>\n

      Odolnost hlin\u00edku proti korozi je jednou z jeho nejcenn\u011bj\u0161\u00edch vlastnost\u00ed - zejm\u00e9na v n\u00e1ro\u010dn\u00fdch podm\u00ednk\u00e1ch.<\/p>\n

      Hlin\u00edk odol\u00e1v\u00e1 korozi, proto\u017ee se na n\u011bm rychle vytv\u00e1\u0159\u00ed vrstva oxidu, kter\u00e1 p\u016fsob\u00ed jako bari\u00e9ra proti dal\u0161\u00ed korozi, na rozd\u00edl od rzi, kter\u00e1 po\u0161kozuje \u017eelezo.<\/strong><\/p>\n

      \"hlin\u00edkov\u00fd
      Ide\u00e1ln\u00ed pro pou\u017eit\u00ed v architektu\u0159e a na mo\u0159i d\u00edky odolnosti proti korozi.<\/figcaption><\/figure>\n<\/p>\n

      Pasivn\u00ed ochrana<\/h3>\n

      Oxidov\u00e1 vrstva je chemicky spojena s povrchem. Neodlupuje se ani neodlamuje. Dokonce i ve vod\u011b nebo vlhk\u00e9m vzduchu se vrstva z\u016fst\u00e1v\u00e1 neporu\u0161en\u00fd<\/strong>.<\/p>\n

      Odolnost v\u016f\u010di chemick\u00fdm l\u00e1tk\u00e1m<\/h3>\n

      Hlin\u00edk odol\u00e1v\u00e1:<\/p>\n

        \n
      • Sladkovodn\u00ed<\/li>\n
      • Mo\u0159sk\u00e1 voda (s omezen\u00edm)<\/li>\n
      • M\u00edrn\u00e9 kyseliny<\/li>\n
      • Organick\u00e1 rozpou\u0161t\u011bdla<\/li>\n<\/ul>\n

        Ve stavebnictv\u00ed, leteck\u00e9m a n\u00e1mo\u0159n\u00edm prost\u0159ed\u00ed tato odolnost sni\u017euje n\u00e1klady na \u00fadr\u017ebu a zvy\u0161uje \u017eivotnost.<\/p>\n

        Eloxov\u00e1n\u00ed pro v\u011bt\u0161\u00ed ochranu<\/h3>\n

        V\u00fdrobci \u010dasto eloxov\u00e1n\u00ed<\/strong> hlin\u00edku pro zes\u00edlen\u00ed vrstvy oxidu. T\u00edm se zlep\u0161\u00ed:<\/p>\n

          \n
        • Odolnost proti opot\u0159eben\u00ed<\/li>\n
        • Ochrana proti po\u0161kr\u00e1b\u00e1n\u00ed<\/li>\n
        • Absorpce barev<\/li>\n<\/ul>\n\n\n\n\n\n\n\n\n
          Funkce<\/th>\nV\u00fdsledek<\/th>\n<\/tr>\n<\/thead>\n
          Tvorba oxidov\u00e9 vrstvy<\/td>\nOkam\u017eit\u011b po vystaven\u00ed vzduchu<\/td>\n<\/tr>\n
          Trvanlivost oxidu<\/td>\nSiln\u00e9 a samoopravn\u00e9<\/td>\n<\/tr>\n
          Eloxov\u00e1n\u00ed<\/td>\nZvy\u0161uje tvrdost povrchu<\/td>\n<\/tr>\n
          Tolerance k \u017eivotn\u00edmu prost\u0159ed\u00ed<\/td>\nVysok\u00e1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          <\/svg> Hlin\u00edk odol\u00e1v\u00e1 korozi, proto\u017ee jeho oxidov\u00e1 vrstva je stabiln\u00ed a samoregenera\u010dn\u00ed.<\/b>Pravda<\/span><\/p>

          Tato vrstva oxidu zabra\u0148uje p\u0159\u00edstupu vzduchu a vody k surov\u00e9mu kovu.<\/p><\/div>
          \n

          <\/svg> Rez na hlin\u00edku je stejn\u00e1 jako na \u017eelezn\u00fdch povr\u0161\u00edch.<\/b>False<\/span><\/p>

          Hlin\u00edk nerezav\u00ed - vytv\u00e1\u0159\u00ed ochrann\u00fd oxid, nikoli \u0161kodliv\u00fd jako rez na \u017eeleze.<\/p><\/div><\/p>\n

          Jak chr\u00e1nit hlin\u00edk p\u0159ed koroz\u00ed?<\/h2>\n

          P\u0159esto\u017ee hlin\u00edk odol\u00e1v\u00e1 korozi, je t\u0159eba o n\u011bj pe\u010dovat - zejm\u00e9na v drsn\u00fdch podm\u00ednk\u00e1ch.<\/p>\n

          Chcete-li hlin\u00edk chr\u00e1nit p\u0159ed koroz\u00ed, pou\u017eijte povrchov\u00e9 \u00fapravy, jako je eloxov\u00e1n\u00ed, pr\u00e1\u0161kov\u00e9 lakov\u00e1n\u00ed nebo lakov\u00e1n\u00ed, a vyhn\u011bte se kontaktu s nekompatibiln\u00edmi kovy.<\/strong><\/p>\n

          \"pr\u00e1\u0161kov\u011b
          Pr\u00e1\u0161kov\u00e9 lakov\u00e1n\u00ed poskytuje dodate\u010dnou ochranu proti vlhkosti a chemik\u00e1li\u00edm.<\/figcaption><\/figure>\n<\/p>\n

          Povrchov\u00e9 \u00fapravy<\/h3>\n
            \n
          1. Eloxov\u00e1n\u00ed<\/strong>: Zvy\u0161uje p\u0159irozenou vrstvu oxidu; \u010din\u00ed hlin\u00edk tvrd\u0161\u00edm a odoln\u011bj\u0161\u00edm v\u016f\u010di chemik\u00e1li\u00edm.<\/li>\n
          2. Pr\u00e1\u0161kov\u00e9 lakov\u00e1n\u00ed<\/strong>: P\u0159id\u00e1v\u00e1 barevnou ochrannou vrstvu prysky\u0159ice.<\/li>\n
          3. Malov\u00e1n\u00ed<\/strong>: Bari\u00e9ra proti soli, vlhkosti a UV z\u00e1\u0159en\u00ed.<\/li>\n<\/ol>\n

            Vyhn\u011bte se galvanick\u00e9 korozi<\/h3>\n

            Kdy\u017e se hlin\u00edk dotkne jin\u00e9ho kovu (nap\u0159. m\u011bdi nebo oceli) za p\u0159\u00edtomnosti vlhkosti, galvanick\u00e1 koroze<\/strong> m\u016f\u017ee doj\u00edt. To zp\u016fsobuje rychlej\u0161\u00ed korozi hlin\u00edku.<\/p>\n

            Abyste tomu zabr\u00e1nili:<\/p>\n

              \n
            • Pou\u017eit\u00ed izola\u010dn\u00edch podlo\u017eek<\/li>\n
            • Pou\u017eit\u00ed ochrann\u00fdch n\u00e1t\u011br\u016f<\/li>\n
            • Vyhn\u011bte se vodn\u00edm past\u00edm mezi kovy<\/li>\n<\/ul>\n

              Pravideln\u00e9 \u010di\u0161t\u011bn\u00ed<\/h3>\n

              Ne\u010distoty, s\u016fl a pr\u016fmyslov\u00e9 \u0161kodliviny mohou nechr\u00e1n\u011bn\u00fd hlin\u00edk pomalu rozkl\u00e1dat. Oplachujte ho \u010distou vodou a pou\u017e\u00edvejte nekysel\u00e9 \u010distic\u00ed prost\u0159edky.<\/p>\n\n\n\n\n\n\n\n\n
              Metoda<\/th>\n\u00darove\u0148 ochrany<\/th>\nB\u011b\u017en\u00e9 pou\u017eit\u00ed<\/th>\n<\/tr>\n<\/thead>\n
              Eloxov\u00e1n\u00ed<\/td>\nVysok\u00e1<\/td>\nArchitektura, elektronika<\/td>\n<\/tr>\n
              Pr\u00e1\u0161kov\u00e9 lakov\u00e1n\u00ed<\/td>\nVysok\u00e1<\/td>\nOkna, n\u00e1bytek<\/td>\n<\/tr>\n
              Malov\u00e1n\u00ed<\/td>\nSt\u0159edn\u00ed<\/td>\nVozidla, ploty<\/td>\n<\/tr>\n
              Pravideln\u00e9 \u010di\u0161t\u011bn\u00ed<\/td>\nZ\u00e1kladn\u00ed<\/td>\nN\u00e1mo\u0159n\u00ed a venkovn\u00ed vybaven\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              <\/svg> Eloxov\u00e1n\u00ed hlin\u00edku zvy\u0161uje jeho odolnost proti opot\u0159eben\u00ed a korozi.<\/b>Pravda<\/span><\/p>

              Eloxov\u00e1n\u00ed zesiluje vrstvu oxidu, \u010d\u00edm\u017e poskytuje lep\u0161\u00ed ochranu a odolnost.<\/p><\/div>
              \n

              <\/svg> Hlin\u00edk m\u016f\u017ee rychle korodovat, pokud nen\u00ed nat\u0159en.<\/b>False<\/span><\/p>

              Hlin\u00edk p\u0159irozen\u011b odol\u00e1v\u00e1 korozi; lakov\u00e1n\u00ed je voliteln\u00e9, pokud se nejedn\u00e1 o extr\u00e9mn\u00ed prost\u0159ed\u00ed.<\/p><\/div><\/p>\n

              Z\u00e1v\u011br<\/h2>\n

              Hlin\u00edk nerezav\u00ed jako \u017eelezo. Chr\u00e1n\u00ed se silnou, samoopravnou vrstvou oxidu. S n\u00e1t\u011bry nebo bez nich nab\u00edz\u00ed hlin\u00edk dlouhodobou odolnost - a to i v n\u00e1ro\u010dn\u00fdch podm\u00ednk\u00e1ch.<\/p>","protected":false},"excerpt":{"rendered":"

              Aluminum does not rust\u2014its oxide layer protects it from corrosion You left a metal tool outside\u2014it turned brown and flaky. But your aluminum ladder? Still shiny. So, does aluminum rust? Aluminum doesn\u2019t rust like iron. Instead, it forms a protective oxide layer that resists corrosion and prevents structural damage. This is one of the reasons […]<\/p>\n","protected":false},"author":6,"featured_media":7730,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"categories":[1],"tags":[],"class_list":["post-11898","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-custom-mold"],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts\/11898","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/comments?post=11898"}],"version-history":[{"count":0,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts\/11898\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/media\/7730"}],"wp:attachment":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/media?parent=11898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/categories?post=11898"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/tags?post=11898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}