Rainbow fringes around crevice corrosion formed on stainless steel AISI 316 after ennoblement in seawater

2009 ◽  
Vol 60 (10) ◽  
pp. 820-824 ◽  
Author(s):  
W. Wang ◽  
X. Zhang ◽  
J. Wang
Keyword(s):  
Stainless Steel ◽  
Crevice Corrosion ◽  
Steel Aisi ◽  
Aisi 316 ◽  
Stainless Steel Aisi

scholarly journals Optimizing Process Parameters of Spark and Wire-Cut Edm through Anova using Stainless Steel Aisi 316 Material

2019 ◽  
Vol 9 (2) ◽  
pp. 817-821
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Process Parameters ◽  
Material Removal ◽  
Removal Rate ◽  
Machining Parameters ◽  
Steel Aisi ◽  
Aisi 316 ◽  
Pulse On Time ◽  
Stainless Steel Aisi

In the present research work, Stainless Steel AISI 316 as per ASTM A 276 has been employed as the base material to perform Spark and Wire-Cut EDM. The main agenda behind performing Spark and Wire-Cut EDM on Stainless Steel AISI 316 is to find out the effect of machining parameters like surface roughness (SR) and MRR (Material Removal Rate). In-case of wire-cut EDM, brass wire) of 0.25 mm diameter is used as a tool and distilled water is used as dielectric fluid and experimental process parameters like Current (A) (2, 3 and 4 Amps), Pulse ON time (B) (25, 30 and 35 μs) and Wire feed rate (C) (40, 60 and 80 mm/sec). Similarly for spark cut EDM copper rod of 12 mm diameter and 65 mm length. Process parameters like Current (A) (6, 12 and 16 Amps), Voltage (B) (30, 35 and 40 Volts) and Pulse ON time (C) (50, 100 and 200μs) were maintained during the experimentation. Statistical tools ANOVA & L-9 Orthogonal Array (OA) have been employed to optimize the machining parameters like Surface Roughness (SR) and MRR (Material Removal Rate).

scholarly journals Stainless steel corrosion in instrumentation pipe

2019 ◽  
Vol 14 (40) ◽  
pp. 31-40
Author(s):  
Jean Victal do Nascimento ◽  
Rafael Adão de Carvalho ◽  
Davi Pereira Garcia ◽  
Rômulo Maziero ◽  
Edelize Angelica Gomes ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Chemical Composition ◽  
Austenitic Stainless Steel ◽  
Stainless Steels ◽  
Chloride Ions ◽  
Main Function ◽  
Marine Atmosphere ◽  
Steel Aisi ◽  
Aisi 316 ◽  
Stainless Steel Aisi

Corrosion, being a destructive process, causes damage in almost all industrial sectors. In this way, it is harmful both from an economic, social and, especially, safety point of view, as it can cause failures in critical equipment and components of an industrial process. At this point, stainless steels are considered the most corrosion resistant metals. The resistance depends on the chemical composition and microstructure, factors that directly influence the passivation of these materials. The resistance is proportionally related to the addition of chromium (Cr) to the mixture, as well as other alloying elements, among which is the molybdenum (Mo), whose main function is to maximize corrosion resistance in the marine atmosphere, as in case of austenitic stainless steel AISI 316 which presents in the chemical composition a percentage of the element Mo. Austenitic stainless steels are applied in instrumentation systems in tubing for reliability in severe atmospheres in accordance with ASTM A269 which establishes the materials applicable to this function. Thus, the present work presents, through a review and case study, Pitting Corrosion of tubings of austenitic stainless steel AISI 316 in the presence of chloride ions (Cl-) coming from the marine atmosphere. The results show that there is no change in the longitudinal and transverse structure for all analyzed tubes, showing a homogeneous austenitic structure, free of intergranular precipitations.

Friction studies of metal surfaces with various 3D printed patterns tested in dry sliding conditions

2017 ◽  
Vol 232 (1) ◽  
pp. 43-53 ◽  
Author(s):  
Y Holovenko ◽  
M Antonov ◽  
L Kollo ◽  
I Hussainova
Keyword(s):  
Stainless Steel ◽  
Coefficient Of Friction ◽  
Wide Range ◽  
The Coefficient Of Friction ◽  
Steel Aisi ◽  
3D Printed ◽  
Surface Patterns ◽  
Aisi 316 ◽  
Aisi 316 L ◽  
Stainless Steel Aisi

In recent years, 3D scanning and printing of plastics has rapidly matured while printing of metallic parts is only gaining popularity due to required refinements of technology combined with cost- and resources effectiveness for the main components of printers and consumables. The 3D printing allows producing complicated shapes that can be hardly produced by conventional mechanical tools and can provide the functionalization of surfaces. In this work, several different stainless steel (AISI 316 L) surface patterns (flat, gecko’s fibrils, dimples, pyramids, mushrooms, mesh, brush, inclined brush) intended for controlling the coefficient of friction were printed with the help of a 3D metal printer by selective laser melting technique. Unidirectional sliding tests were performed with pin-on-disc configuration. Sliding velocity of 5 × 10−3 m/s and continuously increasing load ranged from 5 to 103 N has been applied in the course of “scanning” mode and accompanied by simultaneous recording of the coefficient of friction. A stainless steel (AISI 316) disc counterbody was used in this series of the tests. It was found that the 3D printed structures allow to control the value and stability of the coefficient of friction in a wide range of loads. Microstructural analysis of the worn samples was performed to support the conclusions regarding wear mechanism.

Characterization and Corrosion Behavior of Multilayer [TiN/TiCN]n Growth on AISI 316LVM Steel

2014 ◽  
Vol 598 ◽  
pp. 13-17
Author(s):  
William Aperador ◽  
Mauricio Plaza Torres ◽  
Erika Ruiz
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Morphological Characterization ◽  
Multilayer Coatings ◽  
Spatial Period ◽  
Silicon Substrates ◽  
Tafel Polarization ◽  
Steel Aisi ◽  
Aisi 316 ◽  
Stainless Steel Aisi

In this paper a study of the corrosion resistance is shown in a physiological medium of multilayer coatings [TiN/TiCN] n with periods bilayers of 1, 50 and 150 deposited on silicon substrates ( 100 ) and stainless steel AISI 316 LVM by the method of RF magnetron reactive sputtering with an RF power ( 13.56 MHz ) and using two targets of Ti and TiC. The electrochemical behavior simulated body environment was evaluated by the technique of using Tafel polarization curves, in Hanks solution as electrolyte. Morphological characterization was performed using scanning electron microscopy (SEM) on silicon substrates (100), also was used to characterize the mechanism of attack on the uncoated steel and coated steels. Was found to be markedly increased corrosion resistance to the deposition of multilayer coatings evidencing the effect of the spatial period ( Λ ) in reducing the degradation of these coatings , the effect was shown for the substrate alloy type stainless steel AISI 316 LVM, confirming the good performance of the variation of the bilayers period.

Sign in / Sign up

Export Citation Format

Share Document