[PDF] Top 20 Passivation Behavior of Ce Containing Hyper Duplex Stainless Steels in Sulfuric Acid Solution

... shielding gas increases the austenite phase content and the stability of passive films, which can be attributed to an increase in the concentration of N-related chemical species, such as NH 4 + and CrN, which result in ... See full document

... corrosion behavior of BMGs, such as Zr- [5,6], Fe- [7], Mg- [8], Cu- [9], and Ti-based [10] BMGs, has been substantially ...homogeneous passivation in various aggressive solutions ... See full document

... and passivation behavior in both the active and passive state of hyper duplex stainless steels in the sulfuric acid solution were investigated using a ... See full document

... stainless steels. In recent years, the pitting corrosion of stainless steels in thiosulfate- containing solutions has been investigated by many ...the passivation behavior ... See full document

... in the spontaneous passivation processes of steels containing small amounts of Ru as alloying element [11-16]. In the current study, the addition of Ru to DSS was expected to improve the corrosion ... See full document

... (3) There are two primary reasons for the considerable enhancement of the corrosion resistance of the experimental alloys containing Cu. First, the protective surface film was enriched with the noble metallic ... See full document

... In order to analyze the morphology, thickness and chemical composition of the oxide layer formed on the solution annealed HDSS at 1453 K in air, the alloy was milled by a focused ion beam (FIB) toward a vertical ... See full document

... stainless steels tubing in process instrumentation and sensing, chemical inhibition, hydraulic lines, impulse lines, and utility applications, over an extensive variation of temperatures, flows, and ...of ... See full document

... To gain better and clear understanding of the relationship among these elements, cationic fractioning was conducted, through which it is possible to determine clear chemical composition percentages or effects of ... See full document

... higher than that of the alloy-BASE, the resistance to pitting corrosion of copper contained alloy-1.5Cu in a deaerated 0.5 N HCl + 1 N NaCl and 30 mass% NaCl was lower than that of the alloy-BASE due to an increase of ... See full document

... An alkaline extraction solution, a 5% of sulfuric acid solution, a standard reaction solution (5% of sulfuric acid reacted with sodium sulfite solution) and a sample reaction solution ([r] ... See full document

... 2205 duplex stainless steel in chloride-thiosulfate ...the passivation process was dynamic rather than static; that is, the passive film was growing and dissolving ...the passivation potential ... See full document

... Duplex stainless steels exhibit good mechanical properties and corrosion resistance as well as better weldability and lower sensitivity to the weld ...lean duplex UNS S32101) was evaluated ... See full document

... embedded steels [11]. Till now, the electrochemical and passivation behavior of DSS 2205 combining in high alkaline ...alkaline solution is still the unclear features to know [14, ...and ... See full document

... with sulfuric acid rather than enzyme during the hydrolysis ...to acid (1:7), acid concentration (32 %), hydrolysis temperature (90 ℃ ), hydrolysis time (90 ...(weak acid, furfural, ... See full document

... ferritic stainless steel and mild steel sheets, it is well known that the r-value is improved by promotion of the h111i == ND recrystallization ...ferritic stainless steel sheet has been explained by the ... See full document

... of hyper duplex stainless steel (HDSS) welds, a metallographic examination, a potentiodynamic polarization test, a critical pitting temperature test, scanning electron microscope and energy ... See full document

... after solution heat treatment for 30 min at 1333, 1373 and 1413 ...increasing solution- annealing temperature as compared to the grain size of the £ ...the solution-annealing temperature increased ... See full document

... surface or the amount of the micro-droplet. However, the true reason has not been known. After 0.6 ks holding, the contact mode scanning was applied on these zones (Fig. 6 (b1)(b2)). As a result, most part of such ... See full document

... It is well known that at 748 K, embrittlement occurs in most of the ferritic stainless steels (FSSs) or DSSs aged in a temperature range from 573 to 823 K. 8) This embrittlement is caused by the formation ... See full document