<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;">大型鋼結(jié)構(gòu)如、</span>避雷針<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;">鐵塔、海上燈塔、大型水庫(kù)閘、供水塔、海上采油設(shè)施、罐車(chē)、球罐、貯槽、油箱、碳化塔、換熱器、煙囪、</span>集裝箱<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;">、艦船船體、海上平臺(tái)鋼結(jié)構(gòu)等，都是長(zhǎng)期處于海洋大氣、工業(yè)大氣腐蝕環(huán)境下。若要長(zhǎng)期使用，而不進(jìn)行大面積維修，長(zhǎng)效涂層防護(hù)是為前最佳，使用壽命可達(dá)20-30年，維修費(fèi)用少，可獲得明顯的經(jīng)濟(jì)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;">大氣環(huán)境下的鋼結(jié)構(gòu)受陽(yáng)光、風(fēng)沙、雨雪、霜露及一年四季的溫度和濕度變化作用，其中大氣中的氧和水分是造成戶(hù)外鋼鐵結(jié)構(gòu)腐蝕的重要因素，引起鋼結(jié)構(gòu)腐蝕的工業(yè)氣體含有SO2、CO2、NO2、CI2、H2S及NH3等，這些成份雖然含量很小，但對(duì)鋼鐵的腐蝕危害都是不可忽視的，其中SO2影響最大，CI2可使金屬表面鈍化膜遭到破壞。這些氣體溶于水中呈酸性，形成酸雨，腐蝕金屬設(shè)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;">海洋大氣的特點(diǎn)是含有大量的鹽，主要是NaCI，鹽顆粒沉降在金屬表面上，由于它具有吸潮性及增大表面液膜的導(dǎo)電作用同時(shí)CI-本身又具有很強(qiáng)的侵蝕性，因而加重了金屬表面的腐蝕。鋼結(jié)構(gòu)離海岸越近腐蝕也越嚴(yán)重，其腐蝕速度比內(nèi)陸大氣中高出許多倍。</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;">金屬鋅、鋁具有很大的耐大氣腐蝕的特性。在鋼鐵構(gòu)件上噴鋅或噴鋁，鋅、鋁是負(fù)電位和鋼鐵形成犧牲陽(yáng)極保護(hù)作用從而使鋼鐵基本得到了保護(hù)。目前用噴鋁涂層來(lái)防止工業(yè)大氣、海洋大氣的腐蝕，其特點(diǎn)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)噴鋁涂層與鋼鐵基體結(jié)合力牢固、涂層壽命長(zhǎng)，長(zhǎng)期經(jīng)濟(jì)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)工藝靈活，適用于重要的大型及難維修的鋼鐵結(jié)構(gòu)的長(zhǎng)效防護(hù)，可現(xiàn)場(chǎng)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)噴鋅或噴鋁涂層加防腐涂料封閉，可大大延長(zhǎng)涂層的使用壽命，從理論和實(shí)際應(yīng)用的效果來(lái)看，噴鋅或噴鋁的涂層是防腐涂料的最好底層。金屬?lài)娡繉优c防腐涂料涂層的復(fù)合涂層的防護(hù)壽命較金屬?lài)娡繉雍头栏苛戏雷o(hù)層二者壽命之和還要長(zhǎng)，為單一涂料防護(hù)層壽命的數(shù)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;">重防腐長(zhǎng)效涂料由底漆、中間漆和面漆構(gòu)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;">從長(zhǎng)效經(jīng)濟(jì)性考慮，噴鋁涂層最為經(jīng)濟(jì)，但一次性投入大，施工良好的涂層可在10年內(nèi)無(wú)需維修。環(huán)氧富鋅底漆+環(huán)氧云鐵中間漆及丙烯酸聚氨酯長(zhǎng)效防護(hù)系統(tǒng)具有較佳的經(jīng)濟(jì)性。</p><p><br/></p>