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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.

分析了防腐层完全脱落区域钢板的腐蚀机理,及防腐层未完全脱落部分坑点的腐蚀机理,并在此基础上提出采用外加电流阴极保护法保护罐底板、改造油罐脱水设施结构、在存水中加注缓蚀剂等建议。

Cyclic voltammetry indicated that there were Cr→Cr, Cr →Cr oxidation reaction on anode, while there were Cr→Cr, Cr→Cr, Cr →Cr deoxidization reaction on cathode. The graphite electrodes treated by acid and heating could enhance the reversibility and kinetic of the electrode reaction. The nature graphite electrodes had been eroded during charge/discharge process, while the graphite electrodes by activation could avoide corroding by hexad chromium ion. The reversibility and kinetic of the electrode reaction of chromium ion on activation electrode had been increased, so which indicated that graphite surface augment oxygenous function corps which could increase electrode hydrophile capability.

循环伏安实验表明:铬液流电池的电极反应非常复杂,在阳极存在Cr→Cr,Cr→Cr的氧化反应,在阴极存在Cr→Cr,Cr→Cr,Cr→Cr的还原反应;热处理的石墨电极和重铬酸钾处理的石墨电极能提高电极反应的活性和可逆性;在充放电实验中未处理的石墨电极发生严重腐蚀;分别用这两种方法处理过的石墨电极具有防止六价铬侵蚀的功能;铬离子在活化处理过的石墨电极上的反应活性和可逆性增加,可以认为:重铬酸钾溶液活化处理和加热处理后的石墨表面的含氧官能团增加,电极亲水性增强。

It is discussed each hydronium effect to corrosion action of extraction liquid under wells and the results show that the shape and its structure of surface corrosion produced films of N80 steel to metal has serious effect of further corrosion.

美国的Mississipi和Uttle Greek油田在进行COZ 驱油试验时发现,在未采取CO:腐蚀防护措施时,生产井的管壁不到五个月便腐蚀穿孔,相当于腐蚀速率为12.sm而a。

Atmospheric corrosion of pure copper under sheltered and unsheltered exposure conditions during 1 year period in Shenyang atmosphere is studied.

通过1年的遮雨和未遮雨大气暴露实验,研究了在沈阳大气环境下纯铜的初期腐蚀行为。

One, corrode gas and corrode energy of life of plant of phenomenal Jiang Mou to bilge aluminous canal shoeshine, plunge into a bleed with the injector that takes syringe needle, in the analysis on appearance of gas phase color atlas, the result makes clear, in what taking gas hydric occupy 72% above, the others gas is nitrogen, not check gives oxygen.

一、腐蚀气体与腐蚀现象将某厂气胀铝管鞋油,用带针头的注射器扎通抽气,在气相色谱仪上分析,结果表明,所取气体中氢气占72%以上,其余气体为氮气,未检出氧气。

It i s found that the aged sample suffered more severe corrosion than the unaged samp le.Corrosion type of the aged 310SS is intergrainular,whereas corrosion type of unaged 310SS is uniform.The formation of σ phase due to aging treatment at 700 ℃ for 1000h,reduced Cr content on boundaries in 310SS,which results in the de crease of corrosion resistance of 310SS.

结果表明:经时效处理的310不锈钢比未时效处理者腐蚀严重,前者以晶间腐蚀为主,后者以均匀腐蚀为主。310不锈钢于700℃,100 00 h时效后在晶界大量析出σ相,使晶界附近贫Cr,降低了其抗硫腐蚀性能。

Two kinds of silicon samples with distinct surface treatment, i. e., one surface was chemically etched and the other was unetched, were used to investigate the characteristics of leakage current and surface flashover of semiconductor under impulse voltage in vacuum. The experimental results showed that the surface conditions of samples affected these characteristics greatly. Before flashover, the Ohmic current was observed for unetched samples and the space charge limited current for etched samples, respectively. Meanwhile both samples showed quite different flashover tracks, and the surface-etched samples displayed a much higher onset voltage of flashover.

对采用和未采用表面化学腐蚀处理的半导体硅在冲击电压下的实验表明(参见 Zhang et al , Applied Physics Letters, 2002),试品的表面状况对其泄漏电流和沿面闪络特性有着很大的影响:在沿面闪络之前,未经处理试品的泄漏电流表现为 Ohm 性电流,而表面处理过的试品表现为空间电荷限制电流特性;同时两类试品表面的闪络通道也表现出不同的特征,而采用表面化学腐蚀处理可以明显提高其沿面闪络电压。

The amount of Ni and Cr released from specimens coated with gold was much fewer than those from unplated specimens (P .05), which meant the stability of Ni-Cr alloy on the surface was improved. The biocompatibilities of gold-coated Ni-Cr alloy were better than the uncoated alloy, though there was no difference in biological ranking.

说明其耐电化学腐蚀能力明显提高;镀金后镍铬合金试件的镍离子、铬离子析出量降低,表面稳定性有了显著性提高;无氰镀金法镀金的镍铬合金生物相容性良好,从数据上比较优于未镀金镍铬合金,但生物学评级上无显著性差异。

UNIT2: Nowadays in the city*s tonier residential districts there are people named as the singles, who are usually young, rich and tech-savvy professionals and choose independently their own lifestyle.

UNIT5:财富使美国人的行为一直受到国际上的关注,因为它是旅游业发展的基础。19世纪未,有人认为,在海外的美国人是那些财富骤增的内在危险的象征,并使他们那并非完美无缺的社会准则和首先面临腐蚀的危险。

The proper alkaline content was in favor of compressive strength. The chemically combined water of paste without activator decreases with the increase of fly ash content, the content of Ca2 decreases after 28d. The increase extent of chemically combined water of pastes with NaOH is higher than that of without activator, and the paste with Ca2 is the same. The XRD peak of Ca2 of paste without activator is high at early age, and the peak of mullite and quartz has less change along with age. When NaOH is added, the peak of quartz of fly ash has clear drop. The surfaces of fly ash activated has eroded trace at 7 d.

研究结果表明:适量碱的掺入对强度有利;未掺激发剂浆体的化学结合水量随着粉煤灰掺量的增加而减少,Ca2含量在28d后开始下降;掺NaOH浆体的结合水量随龄期增长的幅度比未掺激发剂的浆体的大,而掺Ca:试样变化较小;未掺激发剂的水泥-粉煤灰体系在早期Ca2的峰值较大,且粉煤灰中的莫来石和石英晶体的衍射峰随龄期变化不大;NaOH掺入后,28d时,粉煤灰中的石英晶体衍射峰明显下降;时于掺激发别的试样,在7d时粉煤灰颗粒表面已被腐蚀。

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