The corrosion rate, corrosive wear rate and polarization curves of aluminium brass and cupronickel alloy were determined in 3.5%NaCl and 3.5%NaCl+NH3(NH4+)solutions, the wear tracks of copper alloys were observed by SEM, the specific energy of the surface layer after corrosion was also measured by single pendulum scratching test.

本文通過(guò)測(cè)定HA177－2火辣辣福利视频，BFe30－1－1在3.5％NaCl和3.5％NaCl＋NH3（NH4+）溶液中的腐蝕速率国内桃色无码视频精品、腐蝕磨損率和電化學(xué)行為以及觀測(cè)腐蝕磨損后銅合金的微觀形貌，研究了腐蝕后樣品的表層性能av在线视屏。

Based on the field investigation of grouting tunnels in the mountain on the left bank of the Shuibuya Dam, a sectional statistical analysis is performed on the areal corrosion ratio of grouting tunnels at different elevations of the curtain line section and the maximal diameter of solution caves, and the corrosion characteristics of rocks in the section of impervious curtain line are obtained.

利用水布埡大壩左岸山體灌漿平硐現(xiàn)場(chǎng)的調(diào)查結(jié)果亚洲欧洲一区，對(duì)防滲帷幕線(xiàn)剖面不同高程灌漿平硐的面溶蝕率和最大溶蝕洞徑進(jìn)行分區(qū)統(tǒng)計(jì)分析，獲得了防滲帷幕線(xiàn)剖面巖體溶蝕特性香蕉A片。

This paper introduces the corrosion and replacement of warm-water heater in decarbonization process and discusses the corrosion principle.

介紹了脫碳流程中溫水加熱器的腐蝕與更換一个人免费色哟哟在线视频观看，并對(duì)腐蝕的機(jī)理進(jìn)行探討。

The coating corrosion mechanism for the overall/partial fallen coatings of bottom plates is analyzed. It suggestes that the impressed current CP be used to protect the bottom plates,the dehydrator be reformed,and the corrosion inhibitor be added to the water.

分析了防腐層完全脫落區(qū)域鋼板的腐蝕機(jī)理欧美中文字幕第一页，及防腐層未完全脫落部分坑點(diǎn)的腐蝕機(jī)理60后老熟妇乱子伦视频，并在此基礎(chǔ)上提出采用外加電流陰極保護(hù)法保護(hù)罐底板、改造油罐脫水設(shè)施結(jié)構(gòu)好男人社区WWW资源、在存水中加注緩蝕劑等建議久久精品免费少妇高潮特黄。

There are many kinds of salts in gound water, salt lakes and salty soil in China's western region, and deicer salts have effects on frost resistance and corrosion resistance of cement concrete or corrosion resistance of steel bar in reinforced concete.

我國(guó)西部地區(qū)地下水、湖水中以及土壤中含有多種鹽類(lèi)少妇人妻无码专区免费视频，道路除冰鹽對(duì)混凝土的抗凍性以及耐腐蝕性以及鋼筋銹蝕有很大的影響奥美黑人一级黄色A片，而混凝土年平均經(jīng)受的凍融次數(shù)對(duì)混凝土結(jié)構(gòu)設(shè)計(jì)具有重要意義三级片91。

The corrosion rates of aluminum deposited with different salts were related to the hygroscopy of them, and the more deliquescent salt is, the more serious corrosion.

經(jīng)鹽沉積后鋁腐蝕的程度與鹽的潮解性能有關(guān)，潮解性能越大中文字幕亚洲一区二区三区，腐蝕越嚴(yán)重国产中文亚洲日韩欧美。

The red deodar cedar does not need to guard against corrosion and the stress management, not the insect and the fungus, termite's attack and the corrosion, the stability is extremely good, the life is long, not easy to distort, cannot cause the pollution to the environment.

紅雪松無(wú)需防腐和壓力處理，不受昆蟲(chóng)及真菌嗯啊啊网站、白蟻的侵襲和腐蝕在线视频黄片免费观看，穩(wěn)定性極佳，使用期限長(zhǎng)免费黄片2019，不易變形久久AV无码精品人妻系列不卡，對(duì)環(huán)境也不會(huì)造成污染。

The red deodar cedar has the high corrosion preventing ability, originates in one kind which grows naturally is been called Thujaplicins the alcohol type material; Moreover one kind is called Thujic the acidic material to guarantee the lumber not by the insect corrosion.

紅雪松具有高度的防腐蝕能力91精品在线观看国产福利，來(lái)源于自然生長(zhǎng)的一種被稱(chēng)為 Thujaplicins 的醇類(lèi)物質(zhì)一区二区www视频；另外一種被稱(chēng)為 Thujic 的酸性物質(zhì)確保了木材不被昆蟲(chóng)侵蝕。

So the proposed method in this dissertation not only meet the requirements for fossil-fuel unit set in GB/T 12145-1999, but also can effectively restrain condensate and feed water system corrosion. Thereby the proposed method can reduce the loss by corrosion's leading accident, lower Fe content in boiler feed water, slow the boiler's scaling speed, delay boiler's chemical cleaning interval, effectively enhance unit's reliability, usability and using life and solve the problem of poisonous chemical deoxidant. So the proposed method can economize substantial expense for power plant.

所以最新国产95自拍视频专区，本文所提出的汽包爐有限氧化性水化學(xué)工況不但能滿(mǎn)足GB/T12145-1999中對(duì)火力發(fā)電機(jī)組及蒸汽動(dòng)力設(shè)備的要求国产一级a爱做片视频，而且可有效抑制凝結(jié)水和給水系統(tǒng)的腐蝕，減少因這些部位腐蝕損壞而引發(fā)的事故停機(jī)損失亚洲就干，降低鍋爐給水中的金屬含量图片区视频区另类，減輕爐內(nèi)的結(jié)垢速度，延長(zhǎng)鍋爐的酸洗間隔精品无码大片AV在线播放，有效提高機(jī)組的可靠性欧洲性爱视频视频一区、可用率和使用壽命，同時(shí)也解決了有毒化學(xué)除氧劑的使用問(wèn)題A黄色毛片，為電廠節(jié)省大筆運(yùn)行費(fèi)用av爽在线看。

But it is difficult to find a perfect method to control drum boiler's corrosion. Now deoxidization water chemistry for drum boiler has the characteristics of high corrosion speed, high Fe content in feedwater and boiler water, high scaling speed, short chemical cleaning interval and needing poisonous chemical deoxidant, etc.

火力發(fā)電站由于大量使用金屬材料，并且金屬材料的使用環(huán)境大都接近其極限使用條件免费毛片观看网站在线，因而常由腐蝕而引發(fā)事故国产青榴视频A片在线观看，造成重大損失。