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hydrogen pinholes

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060247
EISBN: 978-1-62708-261-7
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170021
EISBN: 978-1-62708-297-6
... 2 Effects, levels, and sources of some trace elements in gray iron Element Trace level, % Effects Sources Aluminum ≤0.03 Promotes hydrogen pinhole defects, especially when green sand molds are used and at levels above 0.005%. Neutralizes nitrogen Deliberate addition, ferrous alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430204
EISBN: 978-1-62708-253-2
... Microstructures, (a) at core of ferrite and pearlite, 100×; and (b) at puncture location showing cavitation damage, 400× Fig. 6.93 Failed economizer tube showing puncture in the form of pinhole in between the fins Fig. 6.94 (a) ID surface view of a tube with pinhole-type puncture. (b) Closeup...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130151
EISBN: 978-1-62708-284-6
... for subsurface porosity defects are nitrogen and hydrogen. Types of Gas Porosity Defects Behavior of Gases How to Treat Pinhole and Blowhole Problems This type of porosity has a rough, irregular shape. It is caused by a lack of adequate feed metal during solidification. This defect is an internal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... will not adhere to bare steel without primer. Pinholes in dried film are more prevalent than in other coating types. Tough and flexible, low toxicity, tasteless, colorless, fire resistant. Used in potable water tanks and sanitary equipment; widely used industrial coating. Might not comply with VOC regulations...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
...Abstract Abstract This chapter discusses common forms of corrosion, including uniform corrosion, galvanic corrosion, pitting, crevice corrosion, dealloying corrosion, intergranular corrosion, and exfoliation. It describes the factors that contribute to stress-corrosion cracking, hydrogen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... reaction, reduction, would proceed simultaneously at the cathode. In most cases, hydrogen gas is produced on the cathode. When the gas layer insulates the cathode from the electrolyte, current flow stops, and the cell is polarized. However, oxygen or some other depolarizing agent is usually present...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
... steels Low carbon: 0.1–0.25% C Easily welded No preheat or postheat required Medium carbon: 0.25–0.50% C Use low-hydrogen electrodes Preheat (300–500 °F) Temper High carbon: 0.5–1.0% C Use low-hydrogen electrodes Preheat (400–600 °F) Temper Low-alloy steels Q&T: 0.22% C max...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.9781627082587
EISBN: 978-1-62708-258-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910331
EISBN: 978-1-62708-250-1
..., stress corrosion, hydrogen embrittlement, and crack growth acceleration with metals and includes embrittlement, abnormal swelling, leaching of plasticizers, etc., with nonmetallic materials) Fluid degradation (reactions in which the physical or chemical characteristics of the fluid are altered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050245
EISBN: 978-1-62708-311-9
...; laminations; hydrogen cracking Radiography Changes in density from voids, inclusions, material variations; placement of internal parts Can be used to inspect wide range of materials and thicknesses; versatile; film provides record of inspection Radiation safety requires precautions; expensive; detection...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030215
EISBN: 978-1-62708-282-2
..., hot • … … • … … … … … Fig. 8 Ductility (measured as percent reduction of area) versus hydrogen content for quenched-and-tempered steel at various strength levels. Ultimate tensile strength in megapascals is indicated in parentheses beside the curves. Source: Ref 69 Fig. 9...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480207
EISBN: 978-1-62708-318-8
... extent), unalloyed and all-beta alloys are most amenable to cold deformation. Protective coatings are used on ingots and billets to lower surface contamination levels of hydrogen and oxygen and to help reduce the galling effect of the titanium on the forging die. Coatings are often proprietary...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240509
EISBN: 978-1-62708-251-8
... with iron, aluminum, silicon, carbon, oxygen, and nitrogen and reacts with hydrogen to form a hydride that is insoluble in magnesium. Fig. 27.4 Grain refinement with zirconium. Source: Ref 4 Rare earth (RE) elements are potent solid-solution strengtheners. The REs are usually added...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630211
EISBN: 978-1-62708-270-9
... Environmentally induced cracking Hydrogen damage Intergranular corrosion Dealloying/dezincification Erosion corrosion In addition, there are corrosion mechanisms that form subsets within each of the nine listed above. For example, microbiologically influenced corrosion typically manifests itself...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030045
EISBN: 978-1-62708-282-2
... and Function of Biofilms , Characklis W.G. and Wilderer P.A. , Ed., John Wiley , 1989 , p 289 76. Edyvean R.G.J. , The Effects of Microbiologically Generated Hydrogen Sulfide in Marine Corrosion , MTS J. , Vol 24 , 1990 , p 5 – 9 77. Guezennec J. , Influence...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.9781627082617
EISBN: 978-1-62708-261-7
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740047
EISBN: 978-1-62708-308-9
... aluminum has a very high solubility for hydrogen. In using natural gas or petroleum fueled furnaces, care must be exercised to keep the flame slightly oxidizing. Burner design and placement are important to avoid hot spots in the crucible that will wear more rapidly than desired. Melting is most efficient...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030247
EISBN: 978-1-62708-282-2
...; use oxygen scavengers for normal drilling; use passivating agents for air drilling operations. Hydrogen sulfide Formation, bacteria, chemical or thermal degradation H 2 S analysis, iron sulfide test Underdeposit corrosion, uniform corrosion, sulfide stress cracking Control pH ≥9.5; use sulfide...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030096
EISBN: 978-1-62708-282-2
... The nitrogen content of weld metal increases with the partial pressure of nitrogen in the GTA weld shielding gas. The increase in weld metal nitrogen 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...