Rings, Retaining - Spiral Wound, Uniform Section, Corrosion Resistant, Procurement Specification for, Metric

Durability of adhesive bonded joints in moisture and salt spray environments is essential to USAF aircraft. Structural bonding technology for aerospace applications has depended for many years on the preparation of aluminum surfaces by a sulfuric acid/sodium dichromate (FPL etch) treatment. Recently, specific thin film anodizing techniques, phosphoric acid, and chromic acid anodizing have been developed which not only provide good initial bond strengths but vastly improved environmental durability. These thin anodic films are in contrast to the commonly used thick anodic films such as the sulfuric acid or "hard" sulfuric acid anodic films which are highly corrosion resistant in themselves, but which do not provide good initial bond strengths, particularly in low temperature peel.The objective of this study was to determine the characteristics of anodic films on aluminum alloys that make them corrosion resistant. The chemical composition, physical morphology and structure, and mechanical properties of the thin oxide films were to be defined and correlated with the environmental stability of these surfaces in humidity and salt spray. It is anticipated that anodic film characteristics and corrosion resistance will vary with the anodizing processing conditions.

Review for "Hot deformation characteristics and kinetics analysis for Ni‐based corrosion resistant alloy"

10.1002/eng2.12323/v1/review4 ◽

2020 ◽

Author(s):

Mari Luz Penalva

Keyword(s):

Hot Deformation ◽

Deformation Characteristics ◽

Kinetics Analysis ◽

Corrosion Resistant ◽

Resistant Alloy ◽

Corrosion Resistant Alloy

Could biomass-fueled boilers be operated at higher steam temperatures? Part 3: Initial analysis of costs and benefits

TAPPI Journal ◽

10.32964/tj13.8.65 ◽

2014 ◽

Vol 13 (8) ◽

pp. 65-78 ◽

Cited By ~ 3

Author(s):

W.B.A. (SANDY) SHARP ◽

W.J. JIM FREDERICK ◽

JAMES R. KEISER ◽

DOUGLAS L. SINGBEIL

Keyword(s):

Flue Gas ◽

Power Plants ◽

Superheated Steam ◽

Black Liquor ◽

Simulation Software ◽

Operating Conditions ◽

Costs And Benefits ◽

Steam Generation ◽

Fireside Corrosion ◽

Corrosion Resistant

The efficiencies of biomass-fueled power plants are much lower than those of coal-fueled plants because they restrict their exit steam temperatures to inhibit fireside corrosion of superheater tubes. However, restricting the temperature of a given mass of steam produced by a biomass boiler decreases the amount of power that can be generated from this steam in the turbine generator. This paper examines the relationship between the temperature of superheated steam produced by a boiler and the quantity of power that it can generate. The thermodynamic basis for this relationship is presented, and the value of the additional power that could be generated by operating with higher superheated steam temperatures is estimated. Calculations are presented for five plants that produce both steam and power. Two are powered by black liquor recovery boilers and three by wood-fired boilers. Steam generation parameters for these plants were supplied by industrial partners. Calculations using thermodynamics-based plant simulation software show that the value of the increased power that could be generated in these units by increasing superheated steam temperatures 100°C above current operating conditions ranges between US$2,410,000 and US$11,180,000 per year. The costs and benefits of achieving higher superheated steam conditions in an individual boiler depend on local plant conditions and the price of power. However, the magnitude of the increased power that can be generated by increasing superheated steam temperatures is so great that it appears to justify the cost of corrosion-mitigation methods such as installing corrosion-resistant materials costing far more than current superheater alloys; redesigning biomassfueled boilers to remove the superheater from the flue gas path; or adding chemicals to remove corrosive constituents from the flue gas. The most economic pathways to higher steam temperatures will very likely involve combinations of these methods. Particularly attractive approaches include installing more corrosion-resistant alloys in the hottest superheater locations, and relocating the superheater from the flue gas path to an externally-fired location or to the loop seal of a circulating fluidized bed boiler.

Development and research of lightweight corrosion-resistant cement slurry for fastening highly permeable rocks containing aggressive fluids

Construction of Oil and Gas Wells on Land and Sea ◽

10.33285/0130-3872-2020-01(325)-40-45 ◽

2020 ◽

pp. 40-45

Author(s):

A.M. Voronik ◽

◽

S.V. Kamenskikh ◽

N.M. Ulyasheva ◽

◽

...

Keyword(s):

Cement Slurry ◽

Corrosion Resistant

Development of Sulfuric and Hydrochloric Acid Dew-Point Corrosion-Resistant Steels : 2. Reliability Verification of New Corrosion-Resistant Steel by Field Test

Korean Journal of Metals and Materials ◽

10.3365/kjmm.2014.52.11.857 ◽

2014 ◽

Vol 52 (11) ◽

pp. 857-872 ◽

Cited By ~ 1

Author(s):

Jung-Gu Kim ◽

Sun-Ah Park ◽

Seung-Ik Jang ◽

Byoung-Ho Lee ◽

Jung-Bong Yoon

Keyword(s):

Hydrochloric Acid ◽

Field Test ◽

Dew Point ◽

Corrosion Resistant Steel ◽

Resistant Steel ◽

Corrosion Resistant ◽

Reliability Verification