Choice of electrolyte for electrochemical machining from the point of view of intergranular corrosion

1983 ◽  
Vol 48 (12) ◽  
pp. 3495-3499
Author(s):  
Petr Novák ◽  
Ivo Roušar ◽  
Vladimír Číhal
Keyword(s):  
Stainless Steel ◽  
Intergranular Corrosion ◽  
Nickel Alloys ◽  
Electrochemical Machining ◽  
Electrolyte Solutions ◽  
Electrolyte Composition ◽  
Point Of View ◽  
Electrochemical Drilling ◽  
65 H ◽  
Nickel Base

In a study of electrochemical drilling, the influence of the electrolyte composition on intergranular corrosion of various nickel alloys and of hardenable stainless steel was investigated. The nickel-base alloys did not undergo intergranular corrosion in a solution of 15% NaNO3 + 20% NaClO3 + 65% H2O, but they did so in solutions of NaNO3 alone and in solutions containing NaCl. Stainless steel did not corrode in any of the electrolyte solutions used.

Electrochemical Micro Machining of Stainless Steel with Voltage Pulses

2009 ◽  
Vol 69-70 ◽  
pp. 219-224
Author(s):  
Hui Chen ◽  
Zhen Long Wang ◽  
Zi Long Peng ◽  
Ying Huai Dong ◽  
Wan Sheng Zhao
Keyword(s):  
Stainless Steel ◽  
Oxide Layer ◽  
Electrochemical Machining ◽  
Electrolyte Composition ◽  
Machining Parameters ◽  
Micro Machining ◽  
Short Pulses ◽  
Is Research ◽  
Micro Holes ◽  
Voltage Pulses

The purpose of this paper is to study electrochemical micro machining (ECM) technology on stainless steel. The micro machining of stainless steel is difficult by electrochemical machining, especially in machining deep micro holes, because of an oxide layer formed on the surface. To machining stainless steel, HF is usually used in electrolyte to destabilize the oxide layer. In this paper, ECM of stainless steel by applying short pulses in less toxic and corrosive electrolyte is research. The influence of electrochemical machining parameters such as voltage, current, electrolyte composition to machine stainless steel was investigated. The results showed that the oxide layer can be reduced by adding chloride and complex.

Electrochemical Micro Machining of Stainless Steel in EDTA Complex Electrolyte

2013 ◽  
Vol 446-447 ◽  
pp. 214-218 ◽  
Author(s):  
Hui Chen ◽  
Lei Shi ◽  
Zhi Yong Wang ◽  
Shui Qin Yu
Keyword(s):  
Stainless Steel ◽  
Oxide Layer ◽  
Ethylenediaminetetraacetic Acid ◽  
Electrochemical Machining ◽  
Electrolyte Composition ◽  
Machining Parameters ◽  
Micro Machining ◽  
Edta Complex ◽  
Micro Holes ◽  
The Stability

Electrochemical micro machining is a critical micro machining technology. The purpose of this paper is to study the effect of ethylenediaminetetraacetic acid (EDTA) complex electrolyte in electrochemical micro machining (ECM) of stainless steel. The micro machining of stainless steel is difficult by electrochemical machining, especially in machining deep micro holes, because of an oxide layer formed on the surface. In this paper, ECM of stainless steel in EDTA complex electrolyte was researched. The influence of electrochemical machining parameters such as pulse duration, electrolyte composition to machine stainless steel was investigated. The results showed that EDTA can enhance the stability of electrochemical machining and the electrolyte is eco-friendly.

Influence of Thermo-Mechanical Processing on the Microstructure of Beryllia Dispersed Nickel Alloys

1973 ◽  
Vol 31 ◽  
pp. 184-185
Author(s):  
M.S. Grewal ◽  
S.A. Sastri ◽  
N.J. Grant
Keyword(s):  
High Temperature ◽  
Nickel Alloys ◽  
Thermomechanical Processing ◽  
Cold Work ◽  
High Temperature Strength ◽  
Strengthening Effect ◽  
Mechanical Processing ◽  
Uniform Dispersion ◽  
Oxide Particles ◽  
Nickel Base

Currently there is a great interest in developing nickel base alloys with fine and uniform dispersion of stable oxide particles, for high temperature applications. It is well known that the high temperature strength and stability of an oxide dispersed alloy can be greatly improved by appropriate thermomechanical processing, but the mechanism of this strengthening effect is not well understood. This investigation was undertaken to study the dislocation substructures formed in beryllia dispersed nickel alloys as a function of cold work both with and without intermediate anneals. Two alloys, one Ni-lv/oBeo and other Ni-4.5Mo-30Co-2v/oBeo were investigated. The influence of the substructures produced by Thermo-Mechanical Processing (TMP) on the high temperature creep properties of these alloys was also evaluated.

WAUKESHA ALLOY 88

Alloy Digest ◽  
1993 ◽  
Vol 42 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
High Temperature ◽  
Physical Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Corrosion Resistant ◽  
Temperature Performance ◽  
Nickel Base

Abstract WAUKESHA METAL NO. 88 is a corrosion resistant nickel-base alloy compounded to run against stainless steel without galling or seizing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as casting, heat treating, machining, and joining. Filing Code: Ni-84. Producer or source: Waukesha Foundry Company. Originally published July 1963, revised February 1993.

METRODE 20.70 Nb

Alloy Digest ◽  
2003 ◽  
Vol 52 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Properties ◽  
Arc Welding ◽  
Nickel Alloys ◽  
Submerged Arc Welding ◽  
Inert Gas ◽  
Nominal Composition ◽  
Oxidation Resistant ◽  
Nickel Base ◽  
Submerged Arc

Abstract Metrode 20.70 Nb is a nickel-base consumable with a nominal composition of Ni, 20% Cr, and 2.5% Nb. This alloy is used to join a variety of oxidation-resistant nickel alloys. The product is a solid wire for tungsten inert gas (TIG), metal inert gas (MIG), and submerged arc welding (SAW). This datasheet provides information on tensile properties as well as fracture toughness. It also includes information on joining. Filing Code: Ni-606. Producer or source: Metrode Products Ltd.

ACI HW

Alloy Digest ◽  
1957 ◽  
Vol 6 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Base Alloy ◽  
Heat Treating ◽  
Cyclic Heating ◽  
Nickel Base Alloy ◽  
Type Alloy ◽  
Temperature Performance ◽  
Nickel Base

Abstract Type HW is a nickel-base alloy containing chromium and iron. It is austenitic, non-magnetic, and has exceptionally high resistance to corrosion, cyclic heating, and oxidation. It is of the 60 Ni-12Cr type alloy. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Ni-37. Producer or source: Stainless steel foundries. Revised as Alloy Digest Ni-449, April 1994.

NIROSTA 4429

Alloy Digest ◽  
2000 ◽  
Vol 49 (5) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Pitting Corrosion ◽  
Intergranular Corrosion ◽  
Heat Treating ◽  
Low Carbon ◽  
High Nitrogen ◽  
Temperature Performance ◽  
Pitting Corrosion Resistance

Abstract Nirosta 4429 is a low-carbon, high-nitrogen version of type 316 stainless steel. The low carbon imparts intergranular corrosion resistance while the nitrogen imparts both higher strength and some increased pitting corrosion resistance. It is recommended for use as welded parts that need not or cannot be annealed after welding. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-787. Producer or source: ThyssenKrupp Nirosta.

SANDVIK 5R75

Alloy Digest ◽  
2000 ◽  
Vol 49 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Intergranular Corrosion ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Performance

Abstract Sandvik 5R75 is a molybdenum-containing austenitic stainless steel with titanium added to prevent intergranular corrosion by tying up the carbon. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-777. Producer or source: Sandvik Steel Company. Originally published March 2000, corrected November 2000.

JS777

Alloy Digest ◽  
1980 ◽  
Vol 29 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Cost Effective ◽  
Heat Treating ◽  
Steel Company ◽  
High Alloy ◽  
Cost Effective Alternative ◽  
Resistance To Stress ◽  
Nickel Base

Abstract JS777 is a high-alloy, fully austenitic stainless steel developed for applications where corrosive conditions are too severe for the standard grades of stainless steel. It also provides a cost-effective alternative to more expensive nickel-base and titanium-base alloys. It has relatively high resistance to stress-corrosion cracking and to intergranular corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-377. Producer or source: Jessop Steel Company.

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