{"id":15,"date":"2026-04-22T16:18:00","date_gmt":"2026-04-22T14:18:00","guid":{"rendered":"https:\/\/www.matai.cz\/blog\/zinkovani-galvanicke-vs-zarove\/"},"modified":"2026-06-26T10:28:10","modified_gmt":"2026-06-26T08:28:10","slug":"zinkovani-galvanicke-vs-zarove","status":"publish","type":"post","link":"https:\/\/www.matai.cz\/blog\/zinkovani-galvanicke-vs-zarove\/","title":{"rendered":"Galvanick\u00e9 vs \u017e\u00e1rov\u00e9 zinkov\u00e1n\u00ed: tlou\u0161\u0165ka vrstvy, koroze a vod\u00edkov\u00e1 k\u0159ehkost"},"content":{"rendered":"<p>Zinkov\u00e1 vrstva je nejb\u011b\u017en\u011bj\u0161\u00ed zp\u016fsob ochrany ocelov\u00fdch \u0161roub\u016f proti korozi. Existuj\u00ed ale dva zcela odli\u0161n\u00e9 postupy: <strong>galvanick\u00e9 (elektrolytick\u00e9) zinkov\u00e1n\u00ed<\/strong> a <strong>\u017e\u00e1rov\u00e9 (ponorn\u00e9) zinkov\u00e1n\u00ed<\/strong>. Li\u0161\u00ed se tlou\u0161\u0165kou vrstvy, \u017eivotnost\u00ed, rizikem vod\u00edkov\u00e9 k\u0159ehkosti i vzhledem. Tento \u010dl\u00e1nek vysv\u011btl\u00ed rozd\u00edly a pom\u016f\u017ee vybrat spr\u00e1vnou \u00fapravu.<\/p>\n<h2>Galvanick\u00e9 (elektrolytick\u00e9) zinkov\u00e1n\u00ed<\/h2>\n<p>P\u0159i galvanick\u00e9m zinkov\u00e1n\u00ed (dle ISO 4042) se zinek nan\u00e1\u0161\u00ed elektrolyticky &ndash; sou\u010d\u00e1st je pono\u0159ena do elektrolytu a vlivem elektrick\u00e9ho proudu se na povrch ukl\u00e1d\u00e1 tenk\u00e1, rovnom\u011brn\u00e1 vrstva zinku. Charakteristika:<\/p>\n<ul>\n<li><strong>Tlou\u0161\u0165ka vrstvy:<\/strong> tenk\u00e1, typicky cca <strong>3-20 &micro;m<\/strong>.<\/li>\n<li><strong>Vzhled:<\/strong> hladk\u00fd, leskl\u00fd, esteticky \u010dist\u00fd povrch (\u010dasto s modrou, \u017elutou nebo bezbarvou pasivac\u00ed).<\/li>\n<li><strong>Rozm\u011brov\u00e1 p\u0159esnost:<\/strong> tenk\u00e1 vrstva nem\u011bn\u00ed rozm\u011bry z\u00e1vitu &ndash; vhodn\u00e9 pro p\u0159esn\u00e9 spoje.<\/li>\n<li><strong>Korozn\u00ed odolnost:<\/strong> ni\u017e\u0161\u00ed, vhodn\u00e9 sp\u00ed\u0161e do vnit\u0159n\u00edho a m\u00e9n\u011b n\u00e1ro\u010dn\u00e9ho prost\u0159ed\u00ed.<\/li>\n<\/ul>\n<h2>\u017d\u00e1rov\u00e9 (ponorn\u00e9) zinkov\u00e1n\u00ed<\/h2>\n<p>P\u0159i \u017e\u00e1rov\u00e9m zinkov\u00e1n\u00ed (pro spojovac\u00ed materi\u00e1l dle ISO 10684) se odma\u0161t\u011bn\u00e1 a namo\u0159en\u00e1 sou\u010d\u00e1st pono\u0159\u00ed do <strong>roztaven\u00e9ho zinku<\/strong> o teplot\u011b zhruba 450-480 &deg;C. U \u0161roub\u016f se p\u0159ebyte\u010dn\u00fd zinek odst\u0159e\u010fuje (spun galvanizing). Charakteristika:<\/p>\n<ul>\n<li><strong>Tlou\u0161\u0165ka vrstvy:<\/strong> v\u00fdrazn\u011b siln\u011bj\u0161\u00ed, typicky cca <strong>40-70 &micro;m<\/strong> (\u0159\u00e1dov\u011b 5-10&times; v\u00edce ne\u017e galvanika).<\/li>\n<li><strong>Vzhled:<\/strong> matn\u00fd, hrub\u0161\u00ed, \u0161ed\u00fd povrch.<\/li>\n<li><strong>Korozn\u00ed odolnost:<\/strong> vysok\u00e1 &ndash; siln\u00e1 ob\u011btovan\u00e1 zinkov\u00e1 vrstva chr\u00e1n\u00ed mnohem d\u00e9le, vhodn\u00e9 pro venkovn\u00ed a agresivn\u00ed prost\u0159ed\u00ed.<\/li>\n<li><strong>Rozm\u011bry z\u00e1vitu:<\/strong> siln\u00e1 vrstva z\u00e1vit zv\u011bt\u0161uje &ndash; matice se proto \u010dasto z\u00e1vituj\u00ed a\u017e po zinkov\u00e1n\u00ed (overtapping).<\/li>\n<\/ul>\n<h2>Srovn\u00e1n\u00ed<\/h2>\n<table border=\"1\" cellpadding=\"6\" cellspacing=\"0\">\n<thead>\n<tr>\n<th><\/th>\n<th>Galvanick\u00e9 (elektrolytick\u00e9)<\/th>\n<th>\u017d\u00e1rov\u00e9 (ponorn\u00e9)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Norma (spojovac\u00ed materi\u00e1l)<\/td>\n<td>ISO 4042<\/td>\n<td>ISO 10684<\/td>\n<\/tr>\n<tr>\n<td>Tlou\u0161\u0165ka vrstvy<\/td>\n<td>cca 3-20 &micro;m<\/td>\n<td>cca 40-70 &micro;m<\/td>\n<\/tr>\n<tr>\n<td>Korozn\u00ed odolnost<\/td>\n<td>ni\u017e\u0161\u00ed<\/td>\n<td>vysok\u00e1<\/td>\n<\/tr>\n<tr>\n<td>Vzhled<\/td>\n<td>leskl\u00fd, hladk\u00fd<\/td>\n<td>matn\u00fd, hrub\u0161\u00ed, \u0161ed\u00fd<\/td>\n<\/tr>\n<tr>\n<td>Vod\u00edkov\u00e1 k\u0159ehkost<\/td>\n<td>riziko (nutn\u00e9 odvod\u00edkov\u00e1n\u00ed)<\/td>\n<td>prakticky bez rizika<\/td>\n<\/tr>\n<tr>\n<td>Vhodn\u00e9 prost\u0159ed\u00ed<\/td>\n<td>vnit\u0159n\u00ed, m\u00edrn\u00e9<\/td>\n<td>venkovn\u00ed, agresivn\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Vod\u00edkov\u00e1 k\u0159ehkost<\/h2>\n<p>Toto je z\u00e1sadn\u00ed t\u00e9ma u vysokopevnostn\u00edch \u0161roub\u016f. P\u0159i galvanick\u00e9m zinkov\u00e1n\u00ed m\u016f\u017ee do oceli proniknout atom\u00e1rn\u00ed vod\u00edk a zp\u016fsobit <strong>vod\u00edkovou k\u0159ehkost<\/strong> &ndash; nebezpe\u010dn\u00e9 prask\u00e1n\u00ed zat\u00ed\u017een\u00e9ho \u0161roubu. Proto se vysokopevnostn\u00ed d\u00edly mus\u00ed po galvanick\u00e9m pokoven\u00ed co nejd\u0159\u00edve (zpravidla do 4 hodin) <strong>odvod\u00edkovat (vyp\u00e9kat)<\/strong> v peci.<\/p>\n<p>\u017d\u00e1rov\u00e9 zinkov\u00e1n\u00ed prob\u00edh\u00e1 p\u0159i cca 450 &deg;C, kdy se vod\u00edk z oceli uvol\u0148uje, tak\u017ee riziko vod\u00edkov\u00e9 k\u0159ehkosti je v\u00fdrazn\u011b ni\u017e\u0161\u00ed. Z tohoto d\u016fvodu se velmi pevn\u00e9 t\u0159\u00eddy (zejm\u00e9na 12.9) galvanicky zinkuj\u00ed jen s opatrnost\u00ed; b\u011b\u017en\u011b se pro pevnostn\u00ed d\u00edly do prost\u0159ed\u00ed s rizikem koroze vol\u00ed bu\u010f \u017e\u00e1rov\u00fd zinek, nebo nerez. Pro n\u00e1ro\u010dn\u00e1 prost\u0159ed\u00ed je \u010dasto v\u00fdhodn\u011bj\u0161\u00ed rovnou <a href=\"\/p\/srouby-s-sestihrannou-hlavou-s-drazkou-din-933-a2\/\">nerezov\u00fd spojovac\u00ed materi\u00e1l A2<\/a>, p\u0159\u00edpadn\u011b <a href=\"\/p\/srouby-s-sestihrannou-hlavou-s-drikem-din-931-a4\/\">nerez A4<\/a>, kde ot\u00e1zka zinkov\u00e1n\u00ed zcela odpad\u00e1.<\/p>\n<h2>Mechanick\u00e9 a chemick\u00e9 p\u0159ed\u00fapravy<\/h2>\n<p>Oba procesy vy\u017eaduj\u00ed dokonale \u010dist\u00fd povrch. P\u0159ed zinkov\u00e1n\u00edm se d\u00edly odma\u0161\u0165uj\u00ed a mo\u0159\u00ed v kyselin\u011b, aby se odstranily oleje, okuje a rez. U \u017e\u00e1rov\u00e9ho zinkov\u00e1n\u00ed se nav\u00edc povrch tavidluje (flux), aby roztaven\u00fd zinek dob\u0159e p\u0159ilnul. Kvalita p\u0159ed\u00fapravy p\u0159\u00edmo ovliv\u0148uje p\u0159ilnavost a \u017eivotnost vrstvy &ndash; \u0161patn\u011b o\u010di\u0161t\u011bn\u00fd povrch vede k odlupov\u00e1n\u00ed zinku. To je jeden z d\u016fvod\u016f, pro\u010d je v\u00fdhodn\u00e9 odeb\u00edrat ji\u017e povrchov\u011b upraven\u00fd spojovac\u00ed materi\u00e1l od specializovan\u00e9ho dodavatele, a nikoli pokovovat sv\u00e9pomoc\u00ed.<\/p>\n<h2>Alternativy k zinku: zinkov\u00e9 lamely a dal\u0161\u00ed<\/h2>\n<p>Vedle klasick\u00e9ho galvanick\u00e9ho a \u017e\u00e1rov\u00e9ho zinku existuj\u00ed i dal\u0161\u00ed povrchov\u00e9 \u00fapravy. <strong>Zinkov\u00e1 lamela (zinc flake)<\/strong> je tenk\u00fd povlak ze zinkov\u00fdch a hlin\u00edkov\u00fdch \u0161upinek v pojivu, kter\u00fd nab\u00edz\u00ed vysokou korozn\u00ed odolnost p\u0159i mal\u00e9 tlou\u0161\u0165ce a bez rizika vod\u00edkov\u00e9 k\u0159ehkosti &ndash; proto je obl\u00edben\u00fd u vysokopevnostn\u00edch d\u00edl\u016f (nap\u0159. v automobilov\u00e9m pr\u016fmyslu). Pro nejn\u00e1ro\u010dn\u011bj\u0161\u00ed prost\u0159ed\u00ed se ale i tak \u010dasto s\u00e1hne po nerezov\u00e9m spojovac\u00edm materi\u00e1lu, kde odpad\u00e1 riziko vy\u010derp\u00e1n\u00ed ochrann\u00e9 vrstvy \u00fapln\u011b.<\/p>\n<h2>Jak zinek vlastn\u011b chr\u00e1n\u00ed ocel<\/h2>\n<p>Zinek funguje jako <strong>ob\u011btovan\u00e1 (katodick\u00e1) ochrana<\/strong>. Je m\u00e9n\u011b u\u0161lechtil\u00fd ne\u017e \u017eelezo, tak\u017ee v korozn\u00edm prost\u0159ed\u00ed koroduje p\u0159ednostn\u011b m\u00edsto oceli &ndash; a to i v m\u00edst\u011b drobn\u00e9ho po\u0161kr\u00e1b\u00e1n\u00ed, kde okoln\u00ed zinek &bdquo;ob\u011btuje&ldquo; sebe, aby ochr\u00e1nil obna\u017een\u00e9 \u017eelezo. Proto plat\u00ed jednoduch\u00e9 pravidlo: <strong>\u010d\u00edm siln\u011bj\u0161\u00ed zinkov\u00e1 vrstva, t\u00edm del\u0161\u00ed \u017eivotnost<\/strong>. To je hlavn\u00ed d\u016fvod, pro\u010d \u017e\u00e1rov\u00fd zinek (40-70 &micro;m) vydr\u017e\u00ed v n\u00e1ro\u010dn\u00e9m prost\u0159ed\u00ed \u0159\u00e1dov\u011b d\u00e9le ne\u017e tenk\u00fd galvanick\u00fd povlak (3-20 &micro;m).<\/p>\n<h2>Pasivace a barevn\u00e9 proveden\u00ed galvanick\u00e9ho zinku<\/h2>\n<p>Galvanicky pozinkovan\u00e9 d\u00edly se zpravidla pasivuj\u00ed, co\u017e d\u00e1le zvy\u0161uje korozn\u00ed odolnost a d\u00e1v\u00e1 povrchu charakteristick\u00fd odst\u00edn. Setk\u00e1te se s bezbarvou (modravou), \u017elutou (\u017elutochrom\u00e1tovou) nebo \u010dernou pasivac\u00ed. Barva p\u0159itom slou\u017e\u00ed i k rozli\u0161en\u00ed a estetice. Tyto \u00fapravy ale nezm\u011bn\u00ed z\u00e1kladn\u00ed fakt, \u017ee vrstva je tenk\u00e1 a do dlouhodob\u011b vlhk\u00e9ho venkovn\u00edho prost\u0159ed\u00ed se hod\u00ed m\u00e9n\u011b ne\u017e \u017e\u00e1rov\u00fd zinek.<\/p>\n<h2>\u017divotnost v praxi a obnova<\/h2>\n<p>\u017divotnost zinkov\u00e9 ochrany z\u00e1vis\u00ed na tlou\u0161\u0165ce vrstvy a agresivit\u011b prost\u0159ed\u00ed (klasifikace korozn\u00ed agresivity dle ISO 9223 &ndash; od m\u00edrn\u00e9ho vnit\u0159n\u00edho C1 po velmi agresivn\u00ed p\u0159\u00edmo\u0159sk\u00e9 C5). V m\u00edrn\u00e9m prost\u0159ed\u00ed m\u016f\u017ee i galvanick\u00fd zinek vydr\u017eet roky, v pr\u016fmyslov\u00e9m a p\u0159\u00edmo\u0159sk\u00e9m prost\u0159ed\u00ed se ale tenk\u00e1 vrstva rychle vy\u010derp\u00e1. \u017d\u00e1rov\u00fd zinek d\u00edky siln\u00e9 vrstv\u011b poskytuje dlouhou ochranu i tam. Jakmile je zinek lok\u00e1ln\u011b vy\u010derpan\u00fd, za\u010dne korodovat ocel &ndash; to je sign\u00e1l pro v\u00fdm\u011bnu nebo \u00fadr\u017ebu.<\/p>\n<h2>Kdy kter\u00e9 zinkov\u00e1n\u00ed zvolit<\/h2>\n<ul>\n<li><strong>Galvanick\u00e9:<\/strong> vnit\u0159n\u00ed pou\u017eit\u00ed, elektronika, spot\u0159ebi\u010de, p\u0159esn\u00e9 spoje a aplikace, kde z\u00e1le\u017e\u00ed na hladk\u00e9m vzhledu a p\u0159esnosti z\u00e1vitu.<\/li>\n<li><strong>\u017d\u00e1rov\u00e9:<\/strong> venkovn\u00ed konstrukce, sloupy, z\u00e1bradl\u00ed, mostn\u00ed prvky, zem\u011bd\u011blstv\u00ed &ndash; v\u0161ude tam, kde je pot\u0159eba dlouh\u00e1 \u017eivotnost ve vlhku.<\/li>\n<li><strong>Nerez:<\/strong> p\u0159\u00edmo\u0159sk\u00e9, chlorov\u00e9 a chemicky agresivn\u00ed prost\u0159ed\u00ed, kde ani \u017e\u00e1rov\u00fd zinek nemus\u00ed sta\u010dit.<\/li>\n<\/ul>\n<p>P\u0159i kombinaci pozinkovan\u00fdch \u0161roub\u016f a matic dbejte na kompatibilitu \u00faprav a v korozn\u00edm prost\u0159ed\u00ed dopl\u0148te i odpov\u00eddaj\u00edc\u00ed <a href=\"\/p\/podlozka-1-7-plocha-din-125a-a2\/\">pozinkovan\u00e9 podlo\u017eky<\/a>.<\/p>\n<h2>Shrnut\u00ed<\/h2>\n<p>Galvanick\u00e9 zinkov\u00e1n\u00ed d\u00e1v\u00e1 tenkou (3-20 &micro;m), lesklou a p\u0159esnou vrstvu pro vnit\u0159n\u00ed prost\u0159ed\u00ed, ale nese riziko vod\u00edkov\u00e9 k\u0159ehkosti u pevn\u00fdch \u0161roub\u016f. \u017d\u00e1rov\u00e9 zinkov\u00e1n\u00ed d\u00e1v\u00e1 silnou (40-70 &micro;m) odolnou vrstvu pro venkovn\u00ed pou\u017eit\u00ed bez tohoto rizika, za cenu hrub\u0161\u00edho vzhledu a zv\u011bt\u0161en\u00ed z\u00e1vitu. Zinek chr\u00e1n\u00ed ob\u011btav\u011b &ndash; rozhoduje tlou\u0161\u0165ka vrstvy. Do nejagresivn\u011bj\u0161\u00edch prost\u0159ed\u00ed volte nerez.<\/p>\n<h2>\u010cast\u00e9 dotazy<\/h2>\n<h3>Jak\u00fd je rozd\u00edl mezi galvanick\u00fdm a \u017e\u00e1rov\u00fdm zinkov\u00e1n\u00edm?<\/h3>\n<p>Galvanick\u00e9 (elektrolytick\u00e9) zinkov\u00e1n\u00ed d\u00e1v\u00e1 tenkou vrstvu cca 3-20 um, \u017e\u00e1rov\u00e9 (ponorn\u00e9) zinkov\u00e1n\u00ed silnou vrstvu cca 40-70 um. \u017d\u00e1rov\u00e9 zinkov\u00e1n\u00ed chr\u00e1n\u00ed mnohem d\u00e9le a hod\u00ed se do venkovn\u00edho prost\u0159ed\u00ed.<\/p>\n<h3>Co je vod\u00edkov\u00e1 k\u0159ehkost a kter\u00e9 zinkov\u00e1n\u00ed ji zp\u016fsobuje?<\/h3>\n<p>P\u0159i galvanick\u00e9m zinkov\u00e1n\u00ed m\u016f\u017ee do oceli proniknout vod\u00edk a zp\u016fsobit prask\u00e1n\u00ed zat\u00ed\u017een\u00e9ho \u0161roubu. Vysokopevnostn\u00ed d\u00edly se proto mus\u00ed po pokoven\u00ed odvod\u00edkovat (vyp\u00e9ct), obvykle do 4 hodin. \u017d\u00e1rov\u00e9 zinkov\u00e1n\u00ed p\u0159i cca 450 C toto riziko prakticky nem\u00e1.<\/p>\n<h3>Kter\u00e9 zinkov\u00e1n\u00ed je odoln\u011bj\u0161\u00ed proti korozi?<\/h3>\n<p>\u017d\u00e1rov\u00e9 (ponorn\u00e9) zinkov\u00e1n\u00ed. D\u00edky 5-10x siln\u011bj\u0161\u00ed zinkov\u00e9 vrstv\u011b poskytuje v\u00fdrazn\u011b del\u0161\u00ed ochranu a hod\u00ed se pro venkovn\u00ed a agresivn\u00ed prost\u0159ed\u00ed.<\/p>\n<h3>Pro\u010d jdou matice na \u017e\u00e1rov\u011b zinkovan\u00e9 \u0161rouby h\u016f\u0159?<\/h3>\n<p>Siln\u00e1 zinkov\u00e1 vrstva zv\u011bt\u0161uje rozm\u011br z\u00e1vitu. Matice se proto \u010dasto z\u00e1vituj\u00ed (overtapping) a\u017e po zinkov\u00e1n\u00ed, aby na \u0161roub pasovaly.<\/p>\n<h3>M\u00e1m pro venkovn\u00ed pevnostn\u00ed spoj pou\u017e\u00edt zinek, nebo nerez?<\/h3>\n<p>Pro b\u011b\u017en\u00e9 venkovn\u00ed prost\u0159ed\u00ed posta\u010d\u00ed \u017e\u00e1rov\u00fd zinek. Pro p\u0159\u00edmo\u0159sk\u00e9, chlorov\u00e9 \u010di chemicky agresivn\u00ed prost\u0159ed\u00ed volte rad\u011bji nerez A4, kde ot\u00e1zka zinkov\u00e1n\u00ed i vod\u00edkov\u00e9 k\u0159ehkosti odpad\u00e1.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Galvanick\u00e9 (3-20 um) vs \u017e\u00e1rov\u00e9 ponorn\u00e9 zinkov\u00e1n\u00ed (40-70 um). Korozn\u00ed odolnost, vod\u00edkov\u00e1 k\u0159ehkost, vzhled a kdy kter\u00e9 zinkov\u00e1n\u00ed zvolit.<\/p>\n","protected":false},"author":1,"featured_media":412,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_matai_meta_desc":"Galvanick\u00e9 (3-20 um) vs \u017e\u00e1rov\u00e9 ponorn\u00e9 zinkov\u00e1n\u00ed (40-70 um). Korozn\u00ed odolnost, vod\u00edkov\u00e1 k\u0159ehkost, vzhled a kdy kter\u00e9 zinkov\u00e1n\u00ed zvolit.","_matai_faq":"[{\"q\": \"Jak\u00fd je rozd\u00edl mezi galvanick\u00fdm a \u017e\u00e1rov\u00fdm zinkov\u00e1n\u00edm?\", \"a\": \"Galvanick\u00e9 (elektrolytick\u00e9) zinkov\u00e1n\u00ed d\u00e1v\u00e1 tenkou vrstvu cca 3-20 um, \u017e\u00e1rov\u00e9 (ponorn\u00e9) zinkov\u00e1n\u00ed silnou vrstvu cca 40-70 um. \u017d\u00e1rov\u00e9 zinkov\u00e1n\u00ed chr\u00e1n\u00ed mnohem d\u00e9le a hod\u00ed se do venkovn\u00edho prost\u0159ed\u00ed.\"}, {\"q\": \"Co je vod\u00edkov\u00e1 k\u0159ehkost a kter\u00e9 zinkov\u00e1n\u00ed ji zp\u016fsobuje?\", \"a\": \"P\u0159i galvanick\u00e9m zinkov\u00e1n\u00ed m\u016f\u017ee do oceli proniknout vod\u00edk a zp\u016fsobit prask\u00e1n\u00ed zat\u00ed\u017een\u00e9ho \u0161roubu. Vysokopevnostn\u00ed d\u00edly se proto mus\u00ed po pokoven\u00ed odvod\u00edkovat (vyp\u00e9ct), obvykle do 4 hodin. \u017d\u00e1rov\u00e9 zinkov\u00e1n\u00ed p\u0159i cca 450 C toto riziko prakticky nem\u00e1.\"}, {\"q\": \"Kter\u00e9 zinkov\u00e1n\u00ed je odoln\u011bj\u0161\u00ed proti korozi?\", \"a\": \"\u017d\u00e1rov\u00e9 (ponorn\u00e9) zinkov\u00e1n\u00ed. D\u00edky 5-10x siln\u011bj\u0161\u00ed zinkov\u00e9 vrstv\u011b poskytuje v\u00fdrazn\u011b del\u0161\u00ed ochranu a hod\u00ed se pro venkovn\u00ed a agresivn\u00ed prost\u0159ed\u00ed.\"}, {\"q\": \"Pro\u010d jdou matice na \u017e\u00e1rov\u011b zinkovan\u00e9 \u0161rouby h\u016f\u0159?\", \"a\": \"Siln\u00e1 zinkov\u00e1 vrstva zv\u011bt\u0161uje rozm\u011br z\u00e1vitu. Matice se proto \u010dasto z\u00e1vituj\u00ed (overtapping) a\u017e po zinkov\u00e1n\u00ed, aby na \u0161roub pasovaly.\"}, {\"q\": \"M\u00e1m pro venkovn\u00ed pevnostn\u00ed spoj pou\u017e\u00edt zinek, nebo nerez?\", \"a\": \"Pro b\u011b\u017en\u00e9 venkovn\u00ed prost\u0159ed\u00ed posta\u010d\u00ed \u017e\u00e1rov\u00fd zinek. Pro p\u0159\u00edmo\u0159sk\u00e9, chlorov\u00e9 \u010di chemicky agresivn\u00ed prost\u0159ed\u00ed volte rad\u011bji nerez A4, kde ot\u00e1zka zinkov\u00e1n\u00ed i vod\u00edkov\u00e9 k\u0159ehkosti odpad\u00e1.\"}]","_matai_schema_type":"TechArticle","footnotes":""},"categories":[2],"tags":[],"class_list":["post-15","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-normy-a-materialy"],"_links":{"self":[{"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/posts\/15","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/comments?post=15"}],"version-history":[{"count":1,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/posts\/15\/revisions"}],"predecessor-version":[{"id":218,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/posts\/15\/revisions\/218"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/media\/412"}],"wp:attachment":[{"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/media?parent=15"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/categories?post=15"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/tags?post=15"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}