{"id":1140,"date":"2025-10-29T20:36:46","date_gmt":"2025-10-29T20:36:46","guid":{"rendered":"https:\/\/www.lichtgitter.cz\/en\/?post_type=produkty&p=1140"},"modified":"2026-02-24T10:36:40","modified_gmt":"2026-02-24T10:36:40","slug":"surface-finish","status":"publish","type":"produkty","link":"https:\/\/www.lichtgitter.cz\/en\/blog\/produkty\/pressed-floor-gratings-p\/surface-finish\/","title":{"rendered":"Surface finish"},"content":{"rendered":"\n
\n

Surface finish of pressed gratings<\/strong><\/h2><\/div>\n\n\n\n

<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1. steels S235JR, S355JR<\/h2><\/div>\n\n\n\n
    \n
  • untreated, without surface finish<\/li>\n\n\n\n
  • hot-dip galvanized according to EN ISO 1461<\/li>\n\n\n\n
  • powder coated \u2013 RAL shades<\/li>\n<\/ul>\n\n\n\n

    Excerpt from EN ISO 1461<\/em>
    Minimum zinc coating thickness on steel<\/p>\n\n\n\n

    Steel material thickness
    t
    [mm]<\/strong><\/td>    		Local coating thickness
    (minimum)
     [\u03bcm]<\/strong><\/td>    		Average coating thickness
    (minimum)
     [\u03bcm]<\/strong><\/td><\/tr>
    t < 1.5<\/strong><\/td>35<\/td>45<\/td><\/tr>
    1.5 \u2264 t \u2264 3<\/strong><\/td>45<\/td>55<\/td><\/tr>
    3 < t \u2264 6<\/strong><\/td>55<\/td>70<\/td><\/tr>
    t > 6<\/strong><\/td>70<\/td>85<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Excerpt from EN ISO 9223<\/em>
    Atmospheric corrosivity categories
    <\/p>\n\n\n\n

    Category<\/strong><\/td>Corrosivity<\/strong><\/td>Corrosion loss<\/strong>
    steel [\u03bcm\/year]<\/strong><\/td>    		Corrosion loss<\/strong>
    zinc [\u03bcm\/year]<\/strong><\/td><\/tr>
    C1<\/strong><\/td>Very low<\/td>less than 1.3<\/td>less than 0.1<\/td><\/tr>
    C2<\/strong><\/td>Low<\/td>1.3 to 25<\/td>0.1 to 0.7<\/td><\/tr>
    C3<\/strong><\/td>Medium<\/td>25 to 50<\/td>0.7 to 2.1<\/td><\/tr>
    C4<\/strong><\/td>High<\/td>50 to 80<\/td>2.1 to 4.2<\/td><\/tr>
    C5<\/strong><\/td>Very high<\/td>80 to 200<\/td>4.2 to 8.4<\/td><\/tr>
    CX<\/strong><\/td>Extreme<\/td>200 to 700<\/td>8.4 to 25<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

     
    2. stainless steels (1.4301\/ X5CrNi18-10, 1.4571\/ X6CrNiMoTi17-12-2):<\/h2><\/div>\n\n\n\n
      \n
    • without surface finish<\/li>\n\n\n\n
    • pickled<\/li>\n\n\n\n
    • electropolished<\/li>\n<\/ul>\n\n\n\n

      3. aluminium (AlMg3G22, AlMg1F15):<\/h2><\/div>\n\n\n\n
        \n
      • pickled<\/li>\n\n\n\n
      • coated with subsequent baking<\/li>\n\n\n\n
      • anodized (EURAS shades)<\/li>\n<\/ul>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

        Surface finish of pressed gratings 1. steels S235JR, S355JR Excerpt from EN ISO 1461Minimum zinc coating thickness on steel Steel material thicknesst[mm] Local coating thickness(minimum) [\u03bcm] Average coating thickness(minimum) [\u03bcm] t < 1.5 35 45 1.5 \u2264 t \u2264 3 45 55 3 < t \u2264 6 55 70 t > 6 70 85 Excerpt from EN ISO […]<\/p>\n","protected":false},"featured_media":1567,"parent":1111,"menu_order":5,"template":"","categories":[],"tags":[62],"class_list":["post-1140","produkty","type-produkty","status-publish","has-post-thumbnail","hentry","tag-odporove-svarovane-rosty-p"],"yoast_head":"\nSurface finish - EN | lichtgitter.cz<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lichtgitter.cz\/en\/blog\/produkty\/pressed-floor-gratings-p\/surface-finish\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" 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