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passivation

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Published: 01 November 2019
Figure 56 Physical impact on the passivation layer of an ASIC. The impact caused a crater and several cracks in the proximity. A: Acoustic GHz-image with surface in focus. B: Defocused acoustic GHz-image. C: Scanning electron micrograph of a FIB-prepared cross section along the red marker More
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Published: 01 November 2019
Figure 13 10 keV image of circuit with glass passivation showing negative (bright) charging. Only the metal bond pads are grounded and thus charge-free. More
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Published: 01 November 2019
Figure 14 1.0 keV image of a circuit with glass passivation showing positive (dark) charging. Positive charging tends to be less severe than negative charging and the effects are more subtle. More
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Published: 01 July 2009
Fig. 25.1 Theoretical conditions of corrosion, immunity, and passivation of beryllium for the Be-H 2 O system at 25 °C. Passivation is obtained by the β-form of Be(OH) 2 . Source: Pourbaix 1966 More
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Published: 01 July 2009
Fig. 25.2 Theoretical conditions of corrosion, immunity, and passivation of beryllium at 25 °C (passivation by the hydroxide β-Be(OH) 2 ) More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940183
EISBN: 978-1-62708-302-7
... Abstract This chapter discusses the complex polarization characteristics of active-passive metals and addresses related problems in interpreting their corrosion behavior. It begins by presenting several experimentally derived polarization curves for iron, comparing and contrasting them...
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Published: 01 July 2000
Fig. 7.73 Schematic representation of (a) passive film, (b) passive film rupture by stress-induced slip resulting in exposure of bare substrate, (c) crack initiation by anodic dissolution initiating crevice corrosion conditions before repassivation of exposed substrate, and (d) repassivation More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110269
EISBN: 978-1-62708-247-1
... Abstract This chapter provides a comprehensive overview over all phenomena related to Voltage Contrast (VC) mechanisms in SEM and FIB. The multiple advantages, possibilities, and limits of active and passive VC failure localization are systemized and discussed. The knowledge of all facts...
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Published: 01 August 2013
Fig. 12.8 Above a critical anode potential, certain materials become passive. Their corrosion rate drops abruptly. Note the current density is plotted on a logarithmic scale. More
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Published: 01 July 2009
Fig. 25.5 Corrosion characteristics of an active-passive metal as a function of solution oxidizing power (electrode potential). Source: Fontana 1986 More
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Published: 01 July 2009
Fig. 25.10 Passive current density as a function of pH for S-200F beryllium, exhibiting a minimum in the pH range between a pH of 7 and 9. Source: Hill et al. 1996 More
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Published: 01 July 2009
Fig. 25.11 Passive current density, i pass , and corrosion current density, i corr , as a function of solution pH for S-200D beryllium. A minimum in i pass and i corr exists between a pH of 4.5 and 10.7. Source: Hill et al. 1998 More
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Published: 01 January 2015
Fig. 14.3 Mixed-potential behavior of an active metal and a passive metal in an acid solution More
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Published: 01 August 1999
Fig. 1 Schematic of the passive oxide film that forms on aluminum More
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Published: 01 July 2000
Fig. 3.3 Anodic polarization curve representative of active/passive alloys. Oxide films forming in the potential range a to c cause a decrease in current density. More
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Published: 01 July 2000
Fig. 5.3 Experimental values (+ symbols) of the passivating potential, E pp , of iron plotted to show the relationship to selected phase boundaries from Fig. 5.2 . Dashed lines are extrapolations of lines 13 and 17. Based on Ref 2 More
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Published: 01 July 2000
Fig. 5.35 Schematic polarization curve for an active-passive alloy having susceptibility to localized corrosion (pitting) due to chloride ions. Pitting initiates at Eb,pit. Small-dashed section is observed when chloride ion concentration initiates penetration of the passive film. More
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Published: 01 July 2000
Fig. 7.3 Stages of penetration of passive film leading to corrosion pit formation. (a) Initial stage of pit formation. (b) Partially perforated passive film on pit. (c) Fragment of passive film on edge of pit. Source: Ref 3 More
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Published: 01 July 2000
Fig. 7.4 A mechanism for (a) initiation and (b) development of a passive film. Source: Ref 6 More
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Published: 01 July 2000
Fig. 7.10 (a) Partially perforated passive film on pit in type 304 stainless steel. (b) Fragment of passive film over edge of pit. 0.4 M FeCl 3 . Source: Ref 3 More