The corrosion of iron covered by a thin film of neutral salt solution

1950 ◽  
Vol 46 ◽  
pp. 927 ◽  
Author(s):  
W. I. Whitton
Keyword(s):  
Thin Film ◽  
Salt Solution ◽  
Neutral Salt ◽  
Corrosion Of Iron

Controlled Plasticity Burnishing to Improve the Performance of Friction Stir Processed Ni-Al Bronze

2007 ◽  
Vol 539-543 ◽  
pp. 3807-3813 ◽  
Author(s):  
Paul S. Prevey ◽  
Douglas J. Hornbach ◽  
N. Jayaraman
Keyword(s):  
Salt Solution ◽  
Local Heating ◽  
Fatigue Performance ◽  
Cnc Machine Tools ◽  
Neutral Salt ◽  
Cnc Machine ◽  
Treatment Technology ◽  
Friction Stir ◽  
Tool Positioning ◽  
Post Process

Friction stir welding (FSW) allows the joining of aluminum alloys in ways previously unattainable offering new manufacturing technology. Friction stir processing (FSP) of cast alloys such as Ni-Al bronze eliminates casting voids and improves the properties to that of wrought material. However, the local heating produced by both FSW and FSP can leave a fusion zone with reduced mechanical properties and a heat-affected zone with tensile residual stresses that can be deleterious to fatigue performance. Controlled plasticity burnishing (CPB) is an established surface treatment technology that has been investigated and described extensively for the improvement of damage tolerance, corrosion fatigue, and stress corrosion cracking performance in a variety of alloys. Mechanical CPB processing in conventional CNC machine tools or with robotic tool positioning is readily adapted to industrial FSW and FSP fabrication of components, either simultaneously or as a post process. CPB was applied to FSP Ni-Al Bronze to produce a depth of compression of 2.5 mm and a maximum subsurface magnitude of –150 ksi. The effect of FSP on the fatigue performance in a saltwater marine environment and in the presence of foreign object damage (FOD) was documented with and without CPB processing. FSP was found to increase the fatigue strength of the Ni-Al Bronze by 70% without affecting the corrosion behavior of neutral salt solution. FSW actually produced a more noble material in the acidic salt solution. CPB after FSP mitigated damage 1 mm deep.

An EQCM Study on Corrosion of Iron Thin Film in Deaerated Neutral Solutions

1995 ◽  
Vol 192-194 ◽  
pp. 755-764 ◽  
Author(s):  
M. Seo ◽  
K. Yoshida ◽  
K. Noda
Keyword(s):  
Thin Film ◽  
Corrosion Of Iron

scholarly journals Unusual Property of Prion Protein Unfolding in Neutral Salt Solution

Biochemistry ◽  
2002 ◽  
Vol 41 (36) ◽  
pp. 11017-11024 ◽  
Author(s):  
P. K. Nandi ◽  
E. Leclerc ◽  
D. Marc
Keyword(s):  
Prion Protein ◽  
Salt Solution ◽  
Protein Unfolding ◽  
Neutral Salt ◽  
Unusual Property

Green Laser Drilling Assisted with Neutral Salt Solution

2010 ◽  
Vol 26-28 ◽  
pp. 698-701
Author(s):  
Hua Zhang ◽  
Jia Wen Xu ◽  
Jian She Zhao ◽  
Guo Ran Hua
Keyword(s):  
Salt Solution ◽  
Second Harmonic ◽  
Optical Microscope ◽  
Green Laser ◽  
Laser Drilling ◽  
Recast Layer ◽  
Ambient Atmosphere ◽  
Neutral Salt ◽  
New Processing

Recast layer is an inherent defect commonly associated with holes produced with laser drilling. The defect is likely to limit the extent of aero industrial application. In order to solve the problem, a new processing of laser drilling assisted with neutral salt solution (SALD) has been developed to improve the overall quality of laser-drilled holes. The process bases on the application of a fluid neutral salt solution, which is being on the workpiece surface with the focused laser beam at the same time. The effects of the neutral salt solution during the process mostly consist of thermal chemical reaction and continuing cooling effect of materials. Because of green laser being weakly absorbed underwater, the experiments of SALD have been performed on 0.5mm thickness 321 stainless steel with pulsed Nd:YAG laser at second harmonic wavelength. The optical microscope is used to detect the experimental results. It is found that the recast layer has been effectively removed during the SALD compared with laser drilling in ambient atmosphere conditions. It is confirmed that the principle of SALD is right and the new process can obtain good hole quality without recast layer.

Structural changes and dyeability of silk fibroin fiber following shrinkage in neutral salt solution

1994 ◽  
Vol 51 (4) ◽  
pp. 619-624 ◽  
Author(s):  
Masuhiro Tsukada ◽  
Hiroshi Kato ◽  
Giuliano Freddi ◽  
Nobutami Kasai ◽  
Hiroshi Ishikawa
Keyword(s):  
Silk Fibroin ◽  
Salt Solution ◽  
Structural Changes ◽  
Neutral Salt ◽  
Silk Fibroin Fiber

Pulsed Laser-Based Hybrid Microscribing of Cu and Al in Salt Solution

2020 ◽  
Vol 8 (3) ◽  
Author(s):  
Sooraj Shiby ◽  
Nammi Srinagalakshmi ◽  
Nilesh J. Vasa ◽  
Shigeki Matsuo ◽  
Muralidhar Miryala
Keyword(s):  
Salt Solution ◽  
Electrochemical Etching ◽  
Hybrid Approach ◽  
Pulsed Laser ◽  
Surface Oxidation ◽  
Hybrid Technique ◽  
Neutral Salt ◽  
Salt Solutions ◽  
Laser Scribing ◽  
Selective Area

Abstract The influence of a subnanosecond pulsed laser-based scribing of copper (Cu) and aluminum (Al) in salt solutions (NaCl and KCl) on the formation of microchannels is reported. This technique allows laser scribing along with selective etching of Cu and Al thin films. The focused laser beam can elevate the surface temperature on the sample and hence the chemical reaction rate, resulting in combined ablation with selective-area etching. The depth of microchannels in Cu and Al films is increased by 3–5 μm using the proposed hybrid technique. The average surface roughness values in the microchannel are decreased compared to that of scribing in water and air. The hybrid approach of laser-based scribing combined with electrochemical etching in neutral salt solutions allows uniform channel with almost no redeposit layer and debris on the channel edges. Further, an approach wherein, an application of direct current (DC) voltage (1.2 V) between the tool and the workpiece while laser scribing of Cu and Al in salt solution was demonstrated to improve the channel depth by few micrometers. This hybrid machining technique has also resulted in a reduction in the surface oxidation near the laser-ablated zone compared to that observed in air and water-based experiments.

Initial Exploitation of Corrosion Resistance and Adhesion of 10 Kinds of Silane on A3 Steel

2012 ◽  
Vol 460 ◽  
pp. 94-97 ◽  
Author(s):  
Qi Zhou ◽  
Guang Xia Sun ◽  
Bo Hu ◽  
Ping Zhao
Keyword(s):  
Corrosion Resistance ◽  
Salt Solution ◽  
Salt Water ◽  
Paint Film ◽  
Neutral Salt ◽  
Silane Treatment ◽  
Silane Coupling ◽  
Research Objects ◽  
Pre Treatment ◽  
Silane Solution

Silane coupling agent is gradually concerns as a substitute for phosphate pre-treatment of painting. Ten kinds of silane solution such as the KH-450, KH-460, KH-470, KH-550, KH-560, KH-567, KH-578, 5501, 9810, BTSE were chosen as research objects in this paper. Corrosion resistance and adhesion of film were studied after silane treatment on A3 steel surface by copper sulfate drop test, alternate immersion in salt solution and adhesion experiments. These silane films were compared with uncoated A3 steel specimens. The results show that: silane treatment can improve the corrosion resistance of A3 steel in acid solution. KH-560, KH-5501 and KH-470 were ranked the top three in the corrosion resistance. KH-550, KH-560, KH-567 were fourth, fifth and sixth, respectively. Silane treatment can improve the corrosion resistance of A3 steel in neutral salt solution. KH-460, KH-560 and KH-567 have the best salt water corrosion resistance. KH-560 has better adhesion with paint film, following by KH-550 and KH460. When using ethanol and water as the hydrolysis solvent of silane, KH-450, KH-460, KH-470, KH-550, KH-560, KH-567, KH-578, 5501 have the better stability, but stability of 9810, BTSE are poor.

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