By John R. Weeks, Hugh S. Isaacs (auth.), Mars G. Fontana, Roger W. Staehle (eds.)
This sequence was once geared up to supply a discussion board for overview papers within the zone of corrosion. the purpose of those experiences is to deliver yes components of corrosion technological know-how and expertise right into a sharp concentration. The volumes of this sequence are released nearly on a every year foundation and every comprises 3 to 5 studies. The articles in every one quantity are sekcted in one of these manner as to be of curiosity either to the corrosion scientists and the corrosion technologists. there's, in truth, a specific objective in juxtaposing those pursuits due to the significance of mutual interplay and interdisciplinarity so very important in corrosion reviews. it truly is was hoping that the corrosion scientists during this manner could remain abreast of the actions in corrosion know-how and vice versa. during this sequence the time period "corrosion" is utilized in its very broadest feel. It contains, as a result, not just the degradation of metals in aqueous en vironment but in addition what's normally often called "high-temperature oxidation. " additional, the plan is to be much more normal than those issues; the sequence will comprise all solids and all environments. this present day, engineering solids contain not just metals yet glasses, ionic solids, polymeric solids, and composites of those. Environments of curiosity needs to be prolonged to liquid metals, a large choice of gases, nonaqueous electrolytes, and different non aqueous liquids.
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Additional info for Advances in Corrosion Science and Technology
The contribution of LIT to these results, however, makes questionable a calculation from them of an activation energy for corrosion of Inconel. For this purpose, one needs corrosion 25 LOO~S 1500·~ OPER1TED WI-iH HOT LEh TEMPERATURES AND CONSTANT FLOW RATES ,/ 5 o o ",,,," 50 .... /' ISO 200 ATC·F) 250 300 350 400 Fig. 22. 5000F) Tmax. '· John R. Weeks and Hugh S. 6r----i-----+----_+----~----__I_-/~,'~+-----~---4-----+----~ 8 ~ ! 0 STAINLESS STEEL /' / I .... 304 ..... :I"'--~-_-__ . TL---__~ 1200 4300 4400 4500 4600 4700 MAXIMUM FLUID TEMPERATURE ,OF) Fig.
Often, a true steady-state is not observed16 in less than six months. The corrosion rates are still higher in low-oxygen Na, however, due to the higher concentration gradients of Cr and Ni at the steel-Na interface. From this point on, the term "corrosion rate" will refer to the steadystate corrosion rate as defined in this section, unless otherwise indicated. Effects of Oxygen on Corrosion of Steels and Ni-Base Alloys in Na Oxygen affects the corrosion behavior of steels and Ni-base alloys in remarkably different ways.
1950, the DSE and complex velocity effects in sodium corrosion were not yet known. However, Eq. (17) is still a reasonable model for the corrosion of Ni-base alloys in Na. 53 identified the DSE and suggested a velocity-dependent corrosion rate of stainless steels in Na. (Only two Na velocities were investigated, one believed to be above and one be- 44 John R. Weeks and Hugh S. Isaacs low vc') In an attempt to explain this behavior, Mottley, working with Epstein,ll formulated mass transfer equations based on a velocity-dependent corrosion process and assumed that the oxygen effect on corrosion was due to an oxygen-dependent solubility of Fe in Na.
Advances in Corrosion Science and Technology by John R. Weeks, Hugh S. Isaacs (auth.), Mars G. Fontana, Roger W. Staehle (eds.)