The results show that DFR-corrosion-influence-factors are decreasing as the increasing of ground-corrosion-time and the aggravating of environments causticity. The influence of corrosion fatigue is much serious than that of ground-corrosion. The example of structure fatigue analysis with DFR method under corrosive environment shows the detail steps and data requirements.

通過(guò)試驗(yàn)測(cè)定了各種典型情況的DFR腐蝕影響系數(shù)国产毛片一区二区精品，試驗(yàn)結(jié)果說(shuō)明DFR腐蝕影響系數(shù)隨著地面停放腐蝕時(shí)間的增加和環(huán)境腐蝕性的增強(qiáng)而降低影音先锋你懂，腐蝕疲勞的影響較停放腐蝕的影響更嚴(yán)重国产精品初中视频。

Combining with the National Natural Science Foundation ofChina(No.50478032), following researches were done in this thesis: 1 The variation regularity of the ultimate anti-bending capacity of therectangular-sectioned beam with different corrosion has been obtained through thequalitative analysis of 48 beams (32 corroded beams and 12 comparing beams) withaccelerated corrosion; 2 The conclusion has been obtained that the strain of corroded steel bar andconcrete no longer fit in with the assumption of plane section through the analysis ofthe strain data, the strain relation of steel bar and concrete in the mid-span section ofvariously corroded beams at ultimate has been obtained. Through the building of newgeometric relation, the expression of the height of compressive area in the corrodedbeam with rectangular section has been deduced, and the formula with corrosion rateas the main variable for the anti-bending capacity of the corroded concrete beam hasbeen suggested and verified by experiment.; 3 The influence of steel bar corrosion and the concrete regression to the flexureductility coefficient of the corroded structure component has been analyzed. Based onthe relation of steel bar and concrete at yield and ultimate, the expression for theflexure at yield and ultimate of corroded reinforced concrete beam, and the model forthe calculation of the flexure ductility has been built.

本文結(jié)合國(guó)家自然科學(xué)基金項(xiàng)目(50478032)"既有鋼筋混凝土橋梁時(shí)變可靠度研究"欧美激情高潮老外a一级，主要進(jìn)行了以下研究工作： 1通過(guò)對(duì)48根快速銹蝕鋼筋混凝土矩形截面梁(32根銹蝕梁和12根對(duì)比試驗(yàn)梁)數(shù)據(jù)的定性分析，得到了不同銹蝕率下无码一级做a爱过程免费视频，銹蝕鋼筋混凝土矩形截面梁極限抗彎承載力的變化規(guī)律免费第一黄色； 2通過(guò)對(duì)應(yīng)變數(shù)據(jù)的分析，論證了銹蝕構(gòu)件鋼筋和混凝土的應(yīng)變不再符合平截面假定的結(jié)論美女视频性色毛片全是黄色的，并通過(guò)回歸分析得出了不同銹蝕率的螺紋鋼筋梁和光圓鋼筋梁在極限彎矩作用下天堂网黄色视频，跨中截面處鋼筋應(yīng)變和鋼筋處混凝土應(yīng)變的關(guān)系，通過(guò)構(gòu)造新的幾何關(guān)系人人操,人人草，得出了銹蝕鋼筋混凝土矩形截面梁計(jì)算受壓區(qū)高度的表達(dá)式天堂网在线资源欧美人XXXX日韩，既而得出了以銹蝕率為主要變量的銹蝕鋼筋混凝土矩形截面梁的正截面抗彎計(jì)算建議公式，并通過(guò)試驗(yàn)數(shù)據(jù)加以驗(yàn)證免费日韩黄色片品尚网； 3分析了鋼筋銹蝕和混凝土劣化對(duì)銹蝕構(gòu)件曲率延性系數(shù)的影響国产精品2018不卡在线观看，結(jié)合鋼筋屈服和極限彎矩兩種狀態(tài)下鋼筋和混凝土的應(yīng)變關(guān)系，分別得到了銹蝕鋼筋混凝土矩形截面梁屈服曲率和極限曲率的計(jì)算表達(dá)式精品视频国产狼友第28页；既而推導(dǎo)出曲率延性系數(shù)的計(jì)算模型日韩网络福利直播网站在线观看视频。

That is less copper anion in the environment. PASP has the effect of corrosion inhibition in hydrochloric acid solution. In addition the potation of cathode summit current turned negative as increasing PASP concentration, and the potential of anode summit current turned positive, it can constrain the corrosion of copper. That is to say PASP is a mixed corrosion inhibitor and can constrain the corrosion of copper surface.

循環(huán)伏安測(cè)試結(jié)果表明： PASP的加入同時(shí)抑制了銅表面的陰陽(yáng)極反應(yīng)，使陰極峰和陽(yáng)極峰電流都減弱性欧美野外激情，說(shuō)明此環(huán)境中的銅離子的含量較少欧美性网入口，PASP對(duì)銅在鹽酸中有緩蝕作用；另外陰極峰電位隨著PASP添加濃度的增大而依次變負(fù)女生被男生操的黄色网站，而陽(yáng)極峰電位依次變正www,国产原创Com。，抑制了銅的腐蝕，說(shuō)明PASP是混合型緩蝕劑A片网站视频在线观看，有效地阻止了銅表面的腐蝕另类黑人欧美啪啪亚洲图片。

Of key interest was the trends of corrosion potential on initial period. Corrosion potential–time measurements were undertaken after the samples exposed to the air for 24 h were polarized anodically and cathodically in acetic acid solution. With analyzing of the curves of electrochemical polarization and SEM and EDS data of the samples ,corrosion and electrochemical behavior and mechanism of localized corrosion of 316L stainless steel in acetic acid solution with Cl- were discussed.

測(cè)試了空氣中鈍化24小時(shí)后、陰極極化后和陽(yáng)極極化后人人操午夜精品，試樣在醋酸溶液中自腐蝕電位隨時(shí)間變化的曲線(xiàn)国产91精选无码观看，結(jié)合陰極極化曲線(xiàn)、陽(yáng)極極化曲線(xiàn)免费一级毛片线在线播放、試樣的SEM微觀觀察和EDS成分分析国产在线AAAAAA片，初步探討了316L不銹鋼在含Cl-醋酸溶液中的腐蝕電化學(xué)行為和點(diǎn)腐蝕發(fā)生的機(jī)理。

By testing the corrosion rate of carbon steel in a simulating corrosion system, the corrosion inhibition performance of three corrosion inhibitors (2-methyl imidazone, N-methyl diethanolamine and thiourea) and their compounds was investigated.

通過(guò)測(cè)試碳鋼在模擬腐蝕體系中腐蝕速率的方法www一级www刺激黄片，考察了2-甲基咪唑啉日本jizzjizz、N-甲基二乙醇胺和硫脲3種緩蝕劑的緩蝕性能及其復(fù)配效應(yīng)无码操人视频。

There is no nonuniform corrosion (such as spot corrosion, intercrystalline corrosion etc.) on stainless steel in mud acid solution with the corrosion inhibitor.

在該緩蝕劑存在的土酸介質(zhì)中国产精品露出走光福利，不銹鋼不產(chǎn)生點(diǎn)蝕欧美中文字幕日韩综合、晶間腐蝕等非均勻腐蝕現(xiàn)象。

The corrosion and the mechanism of corrosion resistance of steel products have been introduced in this paper,and the research on the corrosion resistance of the super-thin intumescent fire coatings for steel structures ,which are with both high fire performance and insulation and good corrosion resistance and with the resin of crylic acid as the substrate,is mainly included.

介紹了鋼材的腐蝕及防腐機(jī)理国产又黄又粗又长又刺激视频，研究了以對(duì)丙烯酸樹(shù)脂進(jìn)行復(fù)合改性為基料日韩精品免费手机版在线观看，研制出的一種既具有高效防火隔熱性能，又具有優(yōu)異防腐蝕性能的超薄膨脹型鋼結(jié)構(gòu)防火涂料的防腐性能黄在线观看www页站。

Herein through investigation on the collected CO2 corrosion data from different CO2-contained oil and gas fields, this study analyzed the serious damage and hazards on the gas production, summarized up the general rules of CO2 corrosion and its peculiarities at different areas. According to studies on phenomena, features, mechanism, and influencing factors on CO2 corrosion, this study put forward that a few effective countermeasures should be taken for anti-corrosion technology including injecting corrosion inhibitor, adopting stainless steel or bimetallic materials for the combination casing strings or well tubings.

為此人人澡人人摸人人舔人人看，對(duì)我國(guó)幾個(gè)不同類(lèi)型含CO2油氣田的現(xiàn)場(chǎng)的CO2腐蝕資料進(jìn)行了調(diào)查、研究日韩欧美国内自拍视频，分析了CO2腐蝕給天然氣生產(chǎn)帶來(lái)的嚴(yán)重危害性在免费jIzzjIzz在线视频网址，總結(jié)出在不同類(lèi)型油氣田中CO2腐蝕的一般規(guī)律和不同區(qū)域CO2腐蝕的特殊性；在對(duì)CO2腐蝕的現(xiàn)象日本黄页网战、特點(diǎn)AV-级福利黑白配久久、類(lèi)型、機(jī)理以及腐蝕的影響因素研究的基礎(chǔ)上看片在线，提出了含CO2氣井防腐工藝技術(shù)應(yīng)著重解決好含CO2氣井的完井黄片mmm播放、生產(chǎn)管柱采用不銹鋼或雙金屬?gòu)?fù)合油管、加注緩蝕劑等幾種有效的防腐蝕措施黄私密在线看av。

In acid and salt solution,TiN shows an excell ent corrosion resistance after 100 h immersing test.TiN coating acted as a physi cal barrier between the stainless steel and corrosion media.The corrosion proces s initiated from the pinhole and the corrosion process under the coating is very similar to the pit corrosion form.

結(jié)果表明：TiN涂層可以提高材料在中性和酸性溶液中的耐蝕性能人人摸人人干，TiN涂層的保護(hù)機(jī)制為物理屏障作用；鍍層的微觀結(jié)構(gòu)缺陷是涂層失效的主要原因办公室丝袜激情无码播放黄色工厂，涂層下金屬的腐蝕行為與孔蝕類(lèi)似99r视频国产在线观看免费。

The invention discloses a rotary bending corrosion fatigue test device. The device includes a rotary bending fatigue test device and a corrosion liquor supplying system; wherein, the rotary bending fatigue test device is used for mounting a test piece and applies bending load on the test piece during the process of driving the test piece to rotate and realizes the test on the fatigue data of the test piece. The corrosion liquor supplying system includes a liquor storage tank, a transfusion pump, a flow adjusting valve and a connecting pipeline. The corrosion liquor supplying system feeds the corrosion liquor to the test piece during testing in real time from an output opening.

本發(fā)明公開(kāi)了一種旋轉(zhuǎn)彎曲腐蝕疲勞實(shí)驗(yàn)裝置，該裝置包括旋轉(zhuǎn)彎曲疲勞實(shí)驗(yàn)裝置及腐蝕液供給系統(tǒng)国产精品久久久久影院色麻豆，其中A级片，旋轉(zhuǎn)彎曲疲勞實(shí)驗(yàn)裝置用于試件的裝卡，并在驅(qū)動(dòng)試件旋轉(zhuǎn)過(guò)程中對(duì)其施加彎曲載荷在线播放最新国产精品，以及實(shí)現(xiàn)對(duì)試件疲勞數(shù)據(jù)的測(cè)試黑人黄色网站；腐蝕液供給系統(tǒng)包括儲(chǔ)液罐、輸液泵WWW.AV天堂2017、流量調(diào)節(jié)閥及連接管道精品视频小说图片在线观看，腐蝕液供給系統(tǒng)通過(guò)其輸出口實(shí)時(shí)向測(cè)試中的試件輸送腐蝕液。