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hydrogen pickup

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820143
EISBN: 978-1-62708-339-3
... assemblies include galvanic effects, crevices, assembly stresses in products susceptible to stress-corrosion cracking, and hydrogen pickup and subsequent cracking. The emphasis is placed on the compositions, general welding considerations, and corrosion behavior of these alloys. aluminum aluminum...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120085
EISBN: 978-1-62708-269-3
... the scale and compounds the descaling difficulties. A further problem is that heat treating furnace atmospheres are maintained on the oxidizing side to minimize chances for hydrogen pickup. However, this practice promotes oxygen absorption and scale formation. A layer of oxygen-rich metal, as shown...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120055
EISBN: 978-1-62708-269-3
... at low-to-moderate temperatures. Special Considerations in Heat Treatment Any heat treatment at temperatures above about 427 °C (800 °F) must provide the titanium or titanium alloy with an atmospheric protection that prevents pickup of oxygen or nitrogen and formation of alpha case...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120123
EISBN: 978-1-62708-269-3
... can diffuse into the metal if the protective oxide film is destroyed, severe embrittlement can occur. For example, in highly reducing acids where the titanium oxide film is unstable, hydrides can form rapidly. Hydrogen pickup also has been noted under high-velocity conditions where the protective film...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030148
EISBN: 978-1-62708-282-2
... common to hydrogen damage in forgings, weldments, and castings. They are attributed to hydrogen pickup during melting operations when the melt has a higher solubility for hydrogen than the solid alloy. During cooling from the melt, hydrogen diffuses to and precipitates in voids and discontinuities...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200369
EISBN: 978-1-62708-354-6
... product forms. While early electrodes depended on a gas shield generated by the combustion of a cellulose coating on the electrode, problems with hydrogen and gas pickup resulted in their replacement by the low hydrogen electrode. A welding electrode coating is designated “Low Hydrogen” when...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820077
EISBN: 978-1-62708-339-3
... alloys). For these reasons, every precaution must be taken and welding procedures must be selected that optimize gas shielding and cleanliness to avoid pickup of carbon, nitrogen, oxygen, and hydrogen. Autogenous welds in ferritic stainless steels exhibit relatively simple microstructures. The grain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930189
EISBN: 978-1-62708-359-1
..., the hydrogen pickup can be drastically reduced. References References 1. Steklov O.I. et al. , Method of Evaluating the Influence of Non-Uniformity of Welded Joint Properties on Corrosion , Svar. Proiz., Vol 19 (No. 9 ), 1972 , p 34 – 36 2. Krysiak K.F. et al. , Metals...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480075
EISBN: 978-1-62708-318-8
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820001
EISBN: 978-1-62708-339-3
... this form of corrosion damage. Removing Sources of Hydrogen Through proper selection of welding consumables (that is, low-hydrogen shielded metal arc welding electrodes), proper drying of flux, and welding clean surfaces, the hydrogen pickup can be drastically reduced. Acknowledgment Portions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930249
EISBN: 978-1-62708-359-1
... and cleanliness to avoid pickup of carbon, nitrogen, oxygen, and hydrogen. Autogenous welds in ferritic stainless steels exhibit relatively simple microstructures. The grain size gradually increases from the edge of the HAZ to the fusion boundary. In unstabilized or niobium-stabilized welds, columnar grains...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480331
EISBN: 978-1-62708-318-8
... Another region of the diagram to be aware of is the high-pH, moderate-potential region where Ti 2 O 3 is stable. This condition occurs just occasionally. At elevated temperatures, attack in this region usually manifests itself as excessive hydrogen pickup, which leads to embrittlement, as opposed...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240527
EISBN: 978-1-62708-251-8
... is placed in service, because it can readily initiate fatigue cracking. However, the danger of hydrogen pickup is of even greater importance than that of oxidation. Current specifications limit hydrogen content to a maximum of 125 to 200 ppm, depending on alloy and mill form. Above these limits, hydrogen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820099
EISBN: 978-1-62708-339-3
... “ Corrosion Behavior of Alloy 2205 Weldments .” Hydrogen-Induced Cracking Duplex stainless steels can suffer from weld metal hydrogen cracking, but HAZ cracking has not been reported in practice and is considered highly unlikely to develop. Hydrogen cracking from welding and in-service hydrogen pickup...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480293
EISBN: 978-1-62708-318-8
.... Water and foam should never be applied directly to a titanium fire. Water accelerates the burning rate and can cause hydrogen explosions. However, water can be applied to the surrounding area up to the edge of the fire to cool the unignited material below the ignition point. Milling Titanium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910099
EISBN: 978-1-62708-250-1
... corrosion; galvanic corrosion; erosion-corrosion, including cavitation erosion and fretting corrosion; intergranular corrosion, including sensitization and exfoliation; dealloying; environmentally assisted cracking, including stress-corrosion cracking, corrosion fatigue, and hydrogen damage (including...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030096
EISBN: 978-1-62708-282-2
... content is greater when nitrogen is mixed with an oxidizing gas, such as carbon dioxide (CO 2 ), than with either a reducing (hydrogen) or a neutral (argon) gas. Porosity and concavity are observed in austenitic stainless steel weld metals when more than 10 vol% N is added to an argon shielding gas...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280135
EISBN: 978-1-62708-267-9
... objectives of quenching, annealing, and aging along with the associated risks of surface damage caused by oxidation, carbon pickup, alloy depletion, intergranular attack, and environmental contaminants. It also discusses heat treatment atmospheres, furnace and fixturing requirements, and practical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120039
EISBN: 978-1-62708-269-3
... be carefully executed because titanium can become embrittled owing to pickup of oxygen, hydrogen, and other contaminants during welding. Gas-tungsten arc welding (GTAW) is used with alloy filler rods to fill pores—cold shuts, such as HIP-induced surface depressions or surface-connected pores, that did...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030180
EISBN: 978-1-62708-282-2
... number of storage tanks and other equipment under anodic protection are those used in handling sulfuric acid. Anodic protection has been successful in preserving product quality through reduction of metal pickup by the solution, in extending the useful life of the vessels, and allowing the use of lower...