【摘要】：隨著船舶朝著大型化和復(fù)雜化的發(fā)展趨勢,船舶的安全問題變得更加重要。船舶在其全壽命期內(nèi)都面臨著腐蝕問題,腐蝕可能造成嚴重的事故。船舶的腐蝕防護方法主要有防腐涂層和陰極保護。船舶涂層防腐性能會隨著船舶服役時間的增長而逐漸惡化,導(dǎo)致防腐效果弱化。在傳統(tǒng)的陰極保護設(shè)計中,大多采用經(jīng)驗公式來設(shè)計陰極保護參數(shù)。這種方法不能根據(jù)船舶在不同時期下防腐涂層狀態(tài)的變化,采取靈活可靠的應(yīng)對方案。因此,針對船舶進行全壽命期內(nèi)的腐蝕防護進行科學(xué)有效的設(shè)計具有重要意義。本文研究了涂層的防腐機理和船舶常用涂料,針對目標船設(shè)計了防腐涂層方案,并結(jié)合陰極保護對涂裝的要求,設(shè)計了陰極保護系統(tǒng)涂裝方案。根據(jù)目標船的特點,設(shè)計了外加電流陰極保護系統(tǒng)。該陰極保護系統(tǒng)由保護及控制系統(tǒng)和監(jiān)測系統(tǒng)兩部分組成�？刂葡到y(tǒng)可以通過反饋控制機制自動調(diào)節(jié)電源輸出,從而將保護電位控制在合理范圍內(nèi)。通過監(jiān)測系統(tǒng)可以獲得監(jiān)測點處的實時保護電位,能夠清晰、直觀地掌握陰極保護效果。通過縮比模型試驗,驗證了陰極保護系統(tǒng)的可靠性,并發(fā)現(xiàn)了涂層破損率變化對陰極保護的影響。最后,采用數(shù)值模擬方法,設(shè)計船舶全壽命期的陰極保護方案。通過船舶涂層破損率的變化考慮船舶在不同時期的涂層防腐狀態(tài)。初步設(shè)計采用單獨外加電流陰極保護的方式,但是出現(xiàn)了嚴重的保護電位分布不均勻現(xiàn)象。優(yōu)化設(shè)計采用犧牲陽極陰極保護聯(lián)合外加電流陰極保護的方式,取得了經(jīng)濟有效的陰極保護效果。
[Abstract]:With the development of large-scale and complicated ships, the safety of ships becomes more and more important. Ships are faced with corrosion problems in their lifetime, corrosion may cause serious accidents. The corrosion protection methods of ships are mainly anticorrosive coating and cathodic protection. The anticorrosion performance of ship coating will deteriorate gradually with the increase of ship service time, which leads to the weakening of anticorrosion effect. In the traditional cathodic protection design, the empirical formula is used to design the cathodic protection parameters. This method can not be flexible and reliable according to the state of anticorrosion coating under different periods of time. Therefore, it is of great significance to carry out scientific and effective design for the corrosion protection of ships during their lifetime. In this paper, the anticorrosive mechanism of the coating and the common coatings of the ship are studied. The anticorrosive coating scheme is designed for the target ship, and the coating scheme of the cathodic protection system is designed according to the requirements of the cathodic protection for the coating. According to the characteristics of the target ship, the applied current cathodic protection system is designed. The cathodic protection system consists of protection and control system and monitoring system. The control system can automatically adjust the output of power supply by feedback control mechanism, so that the protection potential can be controlled within a reasonable range. Through the monitoring system, the real time protection potential of the monitoring point can be obtained, and the cathodic protection effect can be grasped clearly and intuitively. The reliability of the cathodic protection system is verified by the scaling model test, and the influence of the damage rate of the coating on the cathodic protection is found. Finally, the cathodic protection scheme for the whole life of ship is designed by using numerical simulation method. The anticorrosion state of ship coating in different periods is considered by changing the damage rate of ship coating. The primary design adopts the method of single applied current cathodic protection, but the distribution of protection potential is not uniform. The optimal design adopts sacrificial anode cathodic protection combined with applied current cathodic protection to obtain economical and effective cathodic protection effect.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U662

【參考文獻】

相關(guān)期刊論文 前10條

1 楊璐嘉;鐘文軍;曹亞洲;劉福國;宋世德;黃一;;基于數(shù)值模擬計算的鋪管船陰極保護系統(tǒng)設(shè)計[J];腐蝕與防護;2015年11期

2 韓恩厚;陳建敏;宿彥京;劉敏;;海洋工程結(jié)構(gòu)與船舶的腐蝕防護——現(xiàn)狀與趨勢[J];中國材料進展;2014年02期

3 王金龍;王佳;賈紅剛;常春霞;彭欣;王海杰;劉在健;山川;;Ag/AgCl固體參比電極研究與應(yīng)用的現(xiàn)狀與進展[J];中國腐蝕與防護學(xué)報;2013年02期

4 吳建華;梁成浩;于楠;黃乃寶;;基于縮比模型模擬的船體單區(qū)域外加電流陰極保護系統(tǒng)[J];大連海事大學(xué)學(xué)報;2010年01期

5 魏仁華;;國外防腐涂料研究進展[J];涂料技術(shù)與文摘;2008年09期

6 梁成浩;于楠;吳建華;黃乃寶;;船體雙區(qū)域外加電流陰極保護縮比模型模擬研究[J];大連理工大學(xué)學(xué)報;2008年05期

7 杜艷霞;張國忠;李健;;陰極保護電位分布的數(shù)值計算[J];中國腐蝕與防護學(xué)報;2008年01期

8 孫建紅;鄭煒;王曉鵬;;水面艦艇船體防腐和陰極保護的優(yōu)化設(shè)計方法[J];中國艦船研究;2007年04期

9 張文東;涂裝設(shè)計工作系統(tǒng)的開發(fā)和應(yīng)用[J];廣船科技;2005年01期

10 姜修林,張奇剛;船舶腐蝕與防腐涂裝的特點[J];全面腐蝕控制;2003年04期

相關(guān)博士學(xué)位論文 前2條

1 郭宇;船舶與海洋結(jié)構(gòu)物陰極保護電位數(shù)值仿真與優(yōu)化設(shè)計[D];哈爾濱工程大學(xué);2013年

2 杜艷霞;金屬儲罐底板外側(cè)陰極保護電位分布規(guī)律研究[D];中國石油大學(xué);2007年

，

本文編號：2336892