{"id":13490,"date":"2025-02-10T11:39:37","date_gmt":"2025-02-10T10:39:37","guid":{"rendered":"https:\/\/www.dst-sg.com\/?p=13490"},"modified":"2026-03-06T11:03:02","modified_gmt":"2026-03-06T10:03:02","slug":"corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers","status":"publish","type":"post","link":"https:\/\/www.dst-sg.com\/sv\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/","title":{"rendered":"Corrosion Protection for Bridge Constructions with DST Dehumidifiers"},"content":{"rendered":"

Corrosion damage to steel constructions is a major challenge that can lead to high maintenance costs and shorter lifespans for bridges around the world. By maintaining a relative humidity (RH) below 50%<\/strong>, steel components can be effectively protected against rust.<\/p>\n

Traditionally, steel has been protected with corrosion-resistant paint\u2014an approach that is often expensive, requires regular upkeep, and adds extra weight to the structure. An increasingly popular alternative is to use avfuktare<\/strong> that circulate dry air in enclosed spaces, reducing the need for extensive painting. This is especially beneficial for hard-to-access areas<\/strong>, such as steel cables or anchor points in suspension bridges, where dehumidification can replace or complement traditional corrosion-protection methods.<\/p>\n

 <\/p>\n

The Challenge<\/h5>\n
    \n
  • High Cost and Complexity<\/strong>
    \nCorrosion-resistant paints are expensive, demanding frequent inspections and repainting.<\/li>\n
  • Added Weight and Accessibility<\/strong>
    \nPaint layers on large surfaces can increase a bridge\u2019s weight significantly, and certain sections are very difficult to reach for maintenance.<\/li>\n
  • Risk of Corrosion<\/strong>
    \nWhen humidity rises above 50% RH, the likelihood of rust forming increases dramatically, potentially shortening the entire bridge\u2019s service life.<\/li>\n<\/ul>\n
    <\/h5>\n
    The Solution<\/h5>\n
      \n
    • Dry Air with DST Dehumidifiers<\/strong>
      \nCirculating dry air within enclosed areas around steel beams and cables dramatically reduces rust formation.<\/li>\n
    • Minimal Maintenance<\/strong>
      \nDST dehumidifiers require little upkeep, which lowers the need for repeated painting.<\/li>\n
    • Versatile Applications<\/strong>
      \nEven complex structures\u2014such as cable anchors and anchorage rooms\u2014can be protected effectively using the same technology.<\/li>\n<\/ul>\n

       <\/p>\n

      References<\/strong><\/p>\n

      Seibu Giken DST AB dehumidifiers are, among others,
      \nused on the following bridges:<\/p>\n

      South Africa:<\/strong> Nelson Mandela-bridge
      \nFrance:<\/strong> Millau Bridge
      \nSwitzerland:<\/strong> Lorraine Bridge
      \nSweden:<\/strong> Liljeholm Bridge, Sickla Bridge,
      \nFot\u00f6\/H\u00f6n\u00f6 Bridge, Vallsundsbron -\u00d6stersund
      \nNorway:<\/strong> Triangle link, Fl\u00e5 Bridge, Mjosund bridge,
      \nLangnes Bridge, Nord-Tr\u00f6ndelag, Grong Bridge, NordTr\u00f6ndelag<\/p>\n

       <\/p>\n

      Liljeholm Bridge (Stockholm, Sweden)<\/h5>\n

      Liljeholm Bridge, consisting of two bascule bridges built many years ago, houses intricate machinery responsible for raising and lowering the bridge deck. This machinery includes a 500-ton counterweight<\/strong> and large gearwheels<\/strong>\u2014all of which must be safeguarded against rust.<\/p>\n

        \n
      • 2001 Installation<\/strong>
        \nA DST dehumidifier was installed in one of the bascule bridges, and the relative humidity was monitored closely. The results were positive: the moisture level dropped below the critical threshold. Encouraged by this success, another DST dehumidifier was installed in the second bascule bridge.<\/li>\n
      • Why Dehumidification?<\/strong>
        \nWhen relative humidity is kept below 50% RH<\/strong>, steel and iron remain highly resistant to rust. Dehumidification thus provides a long-term, cost-effective alternative to conventional rustproofing methods, which can be time-consuming, expensive, and labor-intensive.<\/li>\n<\/ul>\n

        Long-Term Investment<\/strong>
        \nDehumidification offers a more sustainable and eco-friendly approach to corrosion protection than repeated painting or chemical treatments.<\/p>\n

         <\/p>\n

         <\/p>\n

        Hong Kong\u2013Zhuhai\u2013Macau Bridge (China)<\/h5>\n

        Spanning approximately 50 km<\/strong>, the Hong Kong\u2013Zhuhai\u2013Macau Bridge is the world\u2019s longest sea-crossing bridge-tunnel system. Construction began on 15 December 2009<\/strong> and concluded at the end of 2017.<\/p>\n

          \n
        • DST Protection<\/strong>
          \nMultiple DST dehumidifiers safeguard the bridge\u2019s girders<\/strong> against corrosion. By maintaining low humidity levels, the service life of the structure is extended, and maintenance costs are reduced.<\/li>\n
        • Complex, Large-Scale Application<\/strong>
          \nGiven the bridge\u2019s vast length and the demanding marine environment, controlling moisture is critical to preserving steel components.<\/li>\n<\/ul>\n

           <\/p>\n

          Yavuz Sultan Selim Bridge (Istanbul, Turkey)<\/h5>\n

          Also known as the Third Bosphorus Bridge, the Yavuz Sultan Selim Bridge accommodates both rail and motor vehicle traffic over the Bosphorus Strait.<\/p>\n

            \n
          • World-Record Design<\/strong>\n
              \n
            • Widest suspension bridge<\/strong> globally<\/li>\n
            • Longest span<\/strong> incorporating a rail system<\/li>\n
            • Highest bridge towers<\/strong> of any suspension bridge in the world<\/li>\n<\/ul>\n<\/li>\n
            • Revolutionary Dehumidification System<\/strong>
              \nThe bridge\u2019s girders and tension wires are protected by DST dehumidifiers. A recirculating dry-air system<\/strong> ensures that the wire enclosures remain at an optimal humidity level along the entire span, greatly reducing the potential for corrosion and thereby minimizing expensive maintenance interventions.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

              Corrosion damage to steel constructions is a major challenge that can lead to high maintenance costs and shorter lifespans for bridges around the world. By maintaining a relative humidity (RH) below 50%, steel components can be effectively protected against rust. Traditionally, steel has been protected with corrosion-resistant paint\u2014an approach that is often expensive, requires regular […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[239],"tags":[],"class_list":["post-13490","post","type-post","status-publish","format-standard","hentry","category-case-study"],"acf":[],"yoast_head":"\nCorrosion Protection for Bridge Constructions with DST Dehumidifiers - DST<\/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.dst-sg.com\/sv\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Corrosion Protection for Bridge Constructions with DST Dehumidifiers - DST\" \/>\n<meta property=\"og:description\" content=\"Corrosion damage to steel constructions is a major challenge that can lead to high maintenance costs and shorter lifespans for bridges around the world. By maintaining a relative humidity (RH) below 50%, steel components can be effectively protected against rust. Traditionally, steel has been protected with corrosion-resistant paint\u2014an approach that is often expensive, requires regular […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dst-sg.com\/sv\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/\" \/>\n<meta property=\"og:site_name\" content=\"DST\" \/>\n<meta property=\"article:published_time\" content=\"2025-02-10T10:39:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-06T10:03:02+00:00\" \/>\n<meta name=\"author\" content=\"Admin-DST\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Skriven av\" \/>\n\t<meta name=\"twitter:data1\" content=\"Admin-DST\" \/>\n\t<meta name=\"twitter:label2\" content=\"Ber\u00e4knad l\u00e4stid\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minuter\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dst-sg.com\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dst-sg.com\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/\"},\"author\":{\"name\":\"Admin-DST\",\"@id\":\"https:\/\/www.dst-sg.com\/#\/schema\/person\/424c9f5ca527608c910ad7110fcbf0eb\"},\"headline\":\"Corrosion Protection for Bridge Constructions with DST Dehumidifiers\",\"datePublished\":\"2025-02-10T10:39:37+00:00\",\"dateModified\":\"2026-03-06T10:03:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dst-sg.com\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/\"},\"wordCount\":619,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.dst-sg.com\/#organization\"},\"articleSection\":[\"Case Study\"],\"inLanguage\":\"sv-SE\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dst-sg.com\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dst-sg.com\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/\",\"url\":\"https:\/\/www.dst-sg.com\/corrosion-protection-for-bridge-constructions-with-dst-dehumidifiers\/\",\"name\":\"Corrosion Protection for Bridge Constructions with DST Dehumidifiers - 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