Bethlehem Steel

About: Bethlehem Steel is a based out in . It is known for research contribution in the topics: Coating & Corrosion. The organization has 1529 authors who have published 1559 publications receiving 19098 citations. The organization is also known as: Bethlehem Steel Corporation.

Method for increasing fine coal filtration efficiency

Abstract: Fine coals suspended in a coal flotation froth are more efficiently filtered when the flotation froth is subjected to a thickening operation prior to filtration. The thickening operation is accomplished by the use of a clarifier or thickener.

Intergranular stress corrosion cracking of alloy 600 and x-750 in high-temperature deaerated water/steam

Abstract: Intergranular stress corrosion cracking (IGSCC) has been studied in two similar nickel-base alloys, alloys 600 and X-750, in deaerated steam at elevated temperatures (380 °C) In both cases, IGSCC occurs through the nucleation, growth, and linkup of grain boundary voids rather than by grain boundary dissolution The rate of IGSCC is much faster in both alloys when they are heat-treated so that carbon is kept in solution instead of precipitating as grain boundary carbides This higher carbon content allows the formation of a higher methane pressure in grain boundary voids Slip impingement on the grain boundary plays a central role in nucleating a set of voids with a spacing of about 02 μm A second set of more closely spaced bubbles develops between these through the action of stress-assisted diffusion of material from the first set of bubbles

Method for cladding a ferrous substrate with non-ferrous metals

Abstract: A method for producing a composite article having a ferrous substrate and at least one non-ferrous metal, for example, copper or aluminum, clad thereto on one surface or on both surfaces. The method includes cold rolling the substrate and cladding to effect a reduction of about 5%, heating the composite thus formed to a temperature in the range of a minimum of 600* F. and a maximum which is about 100* F. below the temperature at which the clad metal will melt, and rolling the composite within this temperature range to effect a reduction of about 20 to about 50%. The composite may be further reduced to obtain final gage. The product produced by cladding copper and aluminum on the surfaces of a ferrous substrate is also described and claimed.

In vitro stability predictions for the bone/hydroxyapatite composite system.

Abstract: Electroacoustic measurements of the zeta (ζ) potential as a function of pH were collected and used to probe the nature of the ionic contributions to the bond formed between synthetic hydroxyapatite (HA) and bone. HA powder and wet bone powder were dispersed into an electrolyte solution comprised of physiologic saline (0.154M NaCl), electroacoustic measurements collected, and the ζ potential calculated as a function of pH. The ζ potential and particle size then were used to calculate the stability of the composite dispersion, where stability is the ability of a particulate suspension to remain unagglomerated. The stability was used to predict the homo- (HA to HA and bone to bone) versus heterocoagulation (HA to bone) behaviors for the HA/bone system. Although single component bone and HA demonstrated stability against agglomeration, the HA/bone interaction was determined to be unstable for all pH levels tested, including pH 7.4, the normal in vivo pH. These results establish one factor responsible for the observed physicochemical bonding between bone and HA noted by many in the orthopedic community. © 1998 John Wiley & Sons, Inc. J Biomed Mater Res, 42, 412–416, 1998.

Method for cleaning sinter plant gas emissions

Abstract: A method for cleaning sinter plant gas emissions using a wet electrostatic precipitator system having separate recirculating wash liquor loops for the high voltage precipitator section and the pre-scrubber section. The system is operated with acidic washing liquor to avoid scaling and deposition of solids within the system.