防腐工程

<p style="color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: normal; margin-bottom: 5px; margin-left: 0px; margin-right: 0px; margin-top: 5px; orphans: 2; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"><span style="background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); display: inline; float: none; font-family: arial,sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 24px; orphans: 2; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; word-spacing: 0px; zoom: 1;">大型钢结构如、</span>避雷针<span style="background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); display: inline; float: none; font-family: arial,sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 24px; orphans: 2; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; word-spacing: 0px; zoom: 1;">铁塔、海上灯塔、大型水库闸、供水塔、海上采油设施、罐车、球罐、贮槽、油箱、碳化塔、换热器、烟囱、</span>集装箱<span style="background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); display: inline; float: none; font-family: arial,sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 24px; orphans: 2; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; word-spacing: 0px; zoom: 1;">、舰船船体、海上平台钢结构等，都是长期处于海洋大气、工业大气腐蚀环境下。若要长期使用，而不进行大面积维修，长效涂层防护是为前最佳，使用寿命可达20-30年，维修费用少，可获得明显的经济效益。</span></p><p style="color: rgb(51, 51, 51); font-family: arial,sans-serif; font-size: 14px; font-size-adjust: none; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: normal; margin-bottom: 5px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; zoom: 1;">大气环境下的钢结构受阳光、风沙、雨雪、霜露及一年四季的温度和湿度变化作用，其中大气中的氧和水分是造成户外钢铁结构腐蚀的重要因素，引起钢结构腐蚀的工业气体含有SO2、CO2、NO2、CI2、H2S及NH3等，这些成份虽然含量很小，但对钢铁的腐蚀危害都是不可忽视的，其中SO2影响最大，CI2可使金属表面钝化膜遭到破坏。这些气体溶于水中呈酸性，形成酸雨，腐蚀金属设施。</p><p style="color: rgb(51, 51, 51); font-family: arial,sans-serif; font-size: 14px; font-size-adjust: none; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: normal; margin-bottom: 5px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; zoom: 1;">海洋大气的特点是含有大量的盐，主要是NaCI，盐颗粒沉降在金属表面上，由于它具有吸潮性及增大表面液膜的导电作用同时CI-本身又具有很强的侵蚀性，因而加重了金属表面的腐蚀。钢结构离海岸越近腐蚀也越严重，其腐蚀速度比内陆大气中高出许多倍。</p><p style="color: rgb(51, 51, 51); font-family: arial,sans-serif; font-size: 14px; font-size-adjust: none; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: normal; margin-bottom: 5px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; zoom: 1;">金属锌、铝具有很大的耐大气腐蚀的特性。在钢铁构件上喷锌或喷铝，锌、铝是负电位和钢铁形成牺牲阳极保护作用从而使钢铁基本得到了保护。目前用喷铝涂层来防止工业大气、海洋大气的腐蚀，其特点如下:</p><p style="color: rgb(51, 51, 51); font-family: arial,sans-serif; font-size: 14px; font-size-adjust: none; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: normal; margin-bottom: 5px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; zoom: 1;">(1)喷铝涂层与钢铁基体结合力牢固、涂层寿命长，长期经济效益好;</p><p style="color: rgb(51, 51, 51); font-family: arial,sans-serif; font-size: 14px; font-size-adjust: none; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: normal; margin-bottom: 5px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; zoom: 1;">(2)工艺灵活，适用于重要的大型及难维修的钢铁结构的长效防护，可现场施工;</p><p style="color: rgb(51, 51, 51); font-family: arial,sans-serif; font-size: 14px; font-size-adjust: none; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: normal; margin-bottom: 5px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; zoom: 1;">(3)喷锌或喷铝涂层加防腐涂料封闭，可大大延长涂层的使用寿命，从理论和实际应用的效果来看，喷锌或喷铝的涂层是防腐涂料的最好底层。金属喷涂层与防腐涂料涂层的复合涂层的防护寿命较金属喷涂层和防腐涂料防护层二者寿命之和还要长，为单一涂料防护层寿命的数倍。</p><p style="color: rgb(51, 51, 51); font-family: arial,sans-serif; font-size: 14px; font-size-adjust: none; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: normal; margin-bottom: 5px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; zoom: 1;">重防腐长效涂料由底漆、中间漆和面漆构成。</p><p style="color: rgb(51, 51, 51); font-family: arial,sans-serif; font-size: 14px; font-size-adjust: none; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 24px; margin-bottom: 15px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 2em; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; zoom: 1;">从长效经济性考虑，喷铝涂层最为经济，但一次性投入大，施工良好的涂层可在10年内无需维修。环氧富锌底漆+环氧云铁中间漆及丙烯酸聚氨酯长效防护系统具有较佳的经济性。</p><p><br/></p>