Temat: corrosion loss - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Zwiększanie trwałości kominów stalowych
Increase of durability of steel chimneys
Autorzy:: Szumigała, E.
Szumigała, M.
Powiązania:: https://bibliotekanauki.pl/articles/160788.pdf
Data publikacji:: 2012
Wydawca:: Polski Związek Inżynierów i Techników Budownictwa
Tematy:: komin stalowy
trwałość
szybkość korozji
utrata nośności
steel chimney
durability
corrosion velocity
load capacity loss
Opis:: W artykule przedstawiono zagadnienie trwałości kominów stalowych, które spośród różnego rodzaju konstrukcji stalowych należą do obiektów o stosunkowo krótkim okresie użytkowania. Ogólnie zaprezentowano postacie szeroko rozumianej utraty nośności komina oraz wpływ czynników, które przyspieszają kres jego bezpiecznej pracy. Zwrócono uwagę na wpływ różnych rodzajów konstrukcji kominów, schematów statycznych i parametrów dynamicznych na trwałość tych obiektów.
In the paper the problem of the durability of steel chimneys is presented. Among other steel structures, steel chimneys are characterized by a relatively short time of exploitation. It is important to know both the main forms ot the loss of capacity and the decisive factors which considerably reduce the time of safe functionality ot chimneys. Moreover the durability ot these structures depends on the structural type of the chimney as well as on the dynamic parameters.
Źródło:: Przegląd Budowlany; 2012, R. 83, nr 3, 3; 63-66
0033-2038
Pojawia się w:: Przegląd Budowlany
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Comparative analysis of the effect of vernonia amygdaline on subsea transmission pipeline
Autorzy:: Samson, N.
Nwaoha, T. C.
Emmanuel, U. O.
Powiązania:: https://bibliotekanauki.pl/articles/95356.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: pipelines
corrosion
environment
sea water
inhibitors
specimen
VA solution
corrosion rate
weight loss
rurociągi
korozja
środowisko
woda morska
inhibitory
próbka
roztwór VA
szybkość korozji
ubytek masy
Opis:: Subsea transmission pipelines (STP) are designed to transport liquids, gases or solid/liquid mixtures over some distances. STP are buried underground or submerged in water for transportation of natural oil and gas (O&G) products. A Vernonia amygdalina (VA) solution is prepared to act as an inhibitor. The specimens are kept in a workable state. Steps are taken to prepare each specimen. All cuts and sheared edges were ground out to prevent them from becoming sites for preferential attack. The finishing of the specimen surface with grit abrasive paper (sand paper) and rinsing of the specimens in distilled water are carried out. Then, degreasing of specimen in acetone and air-dried are carried out. Upon drying, the specimens are immediately weighed to obtain their initial weights. Twelve specimens are used for the test as follows: 6 Aluminum (Al); and 6 mild steel (MS) samples. With a 2M concentration of VA solution, the MS and Al samples are immersed in different plastic containers containing 400ml of seawater with pH value of 7.25 with no (0%) inhibitor added to it. A 5% (400ml) of the VA solution is poured into the measuring cylinder for each sample-Al and MS. The specimens are suspended by the strings and completely immersed in the different percentage test media. The same procedure is carried out for each of the different percentages (i.e. 10%, 15%, 20%, and 25%) and a total of 12 solutions are set up. The seawater used has 7.25 pH. At the end of every week (168 hours), the specimens are removed from the corrosive media. Observation and recording of appearance of the specimen, noting sites are done to analyze the effect of the VA solution on the AL and MS used for the STP. Values are obtained and graphs plotted on weight loss (WL) and corrosion rate (CR) versus the time. It is observed that the VA solution has different effect on the STP at different time and percentage of the VA solution introduced into the environment of the pipe. It was also observed that optimum inhibition of coupons is obtained between 15-25% of VA solution during the first four weeks of testing. At the fifth week, the inhibitor was gradually losing its effectiveness. This means that more inhibitor needs to be added at regular intervals in order to sustain the effectiveness of the inhibitor.
Źródło:: Journal of Mechanical and Energy Engineering; 2018, 2, 4; 269-276
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Corrosion behavior of ZrC particles reinforcement with Al-12Si composites by weight loss method using acidic media
Autorzy:: John, C. F.
Paul, R. C.
Singh, S. C. E.
Jacobjose, J.
Ramkumar, T.
Hikku, G. S.
Sharma, R. K.
Sengottuvel, P.
Powiązania:: https://bibliotekanauki.pl/articles/200059.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Al-Si-ZrC composites
powder metallurgy
weight loss method
corrosion rate
SEM
kompozyty Al-Si-ZrC
metalurgia proszków
metoda redukcji masy
szybkość korozji
Opis:: This paper aims to investigate the corrosion behavior of zirconium carbide (ZrC) reinforced Al – Si metal matrix composites (MMCs) in a mixture of acidic solution using weight loss method. The composites are prepared by powder metallurgy method. Al-12Si-xZrC composites containing 0, 5, and 10 weight percentage of ZrC particles are compacted in a die set assembly and sintered in an inert gas muffle furnace. The acidic solutions used for corrosion are 1 N HCl, 1 N H₂SO₄ and 1 N HNO₃. The corrosion characteristics of Al-12Si-xZrC composites and the pure Al were experimentally evaluated. The corrosion test was carried out at different weight proportions of the samples in various concentrations of the acid such as 1 N HCl, 1 N H₂SO₄ and 1 N HNO₃ for different exposure time (i.e., 24 h, 72 h, 144 h and 216 h), respectively. The results specified that corrosion rate of composites was lower than that of base metal Al under the corrosive atmosphere, regardless of exposure time and acidic solutions used as corrodents. Al-12Si-xZrC composites become more corrosion resistant as the ZrC content is increased. This is because of the development of stable oxide layer above the specimens. Scanning electron microscopy (SEM) confirms the degree of attack of acidic solution on the surface of the examined material.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 9-16
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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