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descaling

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Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001229
EISBN: 978-1-62708-170-2
... practices. acid pickling batch pickling continuous pickling descaling electrolytic pickling hydrochloric acid inhibitors pickling pickling defects pickling equipment precleaning safety practices scale removal spent pickle liquor disposal steel sulfuric acid OXIDE SCALE must...
Image
Published: 01 January 2005
Fig. 16 Flow chart of operations for molten-salt descaling, neutralizing pickling, and final pickling of titanium alloys Solution No. Type of solution Composition of solution Operating temprature Cycle time, min °C °F 1 Descale 60–90% NaOH, rem NaNO 3 and Na 2 CO 3 425 More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004004
EISBN: 978-1-62708-185-6
... to size, machining, descaling, cutting to length, and lubricating. It lists the advantages of the cold heading over machining. Materials selection criteria for dies and punches in cold heading are also described. The article provides examples that demonstrate tolerance capabilities and show dimensional...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003220
EISBN: 978-1-62708-199-3
... performance of stainless steel. This article describes the surface treatment of stainless steels including abrasive blast cleaning, acid pickling, salt bath descaling, passivation treatments, electropolishing, and the necessary coating processes involved. It also describes the surface treatment of heat...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001312
EISBN: 978-1-62708-170-2
..., blast cleaning, chemical descaling, pickling or etching, anodizing, autoclaving, polishing, buffing, vapor phase nitriding, and electroplating. Applications of these surface treatment processes are also reviewed. anodizing autoclaving blast cleaning buffing chemical descaling cleaning...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001305
EISBN: 978-1-62708-170-2
...Abstract Abstract Passivation; pickling, that is, acid descaling; electropolishing; and mechanical cleaning are important surface treatments for the successful performance of stainless steel used for piping, pressure vessels, tanks, and machined parts in a wide variety of applications...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001307
EISBN: 978-1-62708-170-2
..., and descaling in molten salt. Alkaline scale conditioning is helpful in modifying the scale to facilitate its removal by these methods. When extremely heavy oxide layers must be removed, grinding is an appropriate preliminary operation. Combinations of two or more methods are often used. Before these removal...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005777
EISBN: 978-1-62708-165-8
..., and descaling are chemical cleaning methods. The electrochemical cleaning methods include electropolishing, electrolytic alkaline cleaning, and electrolytic pickling. The article provides information on cleanliness measurement methods such as qualitative tests and quantitative tests to ensure product quality...
Image
Published: 01 December 2009
Fig. 8 Equivalent total strain distribution at the homogeneous scale for the different time moments during subsequent descaling. Note the peeling off of the partly spalled scale as first in the sequence. Source: Ref 109 More
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001221
EISBN: 978-1-62708-170-2
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001311
EISBN: 978-1-62708-170-2
... metal and to maintain safe procedure during the working of titanium materials. Generally, a heavy oxide layer resulting from hot working of the metal is removed by grit blasting or other mechanical means, or by salt bath descaling. After removal of the scale, further mechanical or chemical treatment...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001440
EISBN: 978-1-62708-173-3
... the oxide layer in the joint area is light or heavy. Degreasing Grease and oil accumulated during forming and machining must be removed before welding to avoid weld contamination. Scale-free metal requires only degreasing. Degreasing precedes descaling for metal with an oxide scale. Methods...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003221
EISBN: 978-1-62708-199-3
... products are available from metal finishing suppliers. (b) 1.16 sp gr Except for bright annealed material, copper alloys must be (a) pickled after each annealing treatment, (b) completely descaled, and (c) bright dipped to produce a natural surface color and luster suitable for other finishing...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
...-descaled strips. Geleji's formula indicates the opposite trend ( Ref 10 ): (Eq 3) μ = 1.05 − 0.0005 T − 0.056 ν where T is the temperature in °C, and ν is the rolling velocity in m/s. The relationship was obtained for steel rolls by applying the inverse method matching the measured...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003213
EISBN: 978-1-62708-199-3
... pickling Salt bath descaling Alkaline descaling Acid cleaning The most important considerations in selecting one of the previous methods are: Thickness of rust or scale Composition of metal Condition of metal (product form or heat treatment) Allowable metal loss Surface...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004203
EISBN: 978-1-62708-184-9
... of localized areas is best addressed through conventional weld-cleaning methods, such as pickling pastes. Electrolytic pickling and descaling processes may also be effective. Stainless wire brushing is also an acceptable means of heat tint removal. The conventional postfabrication passivation techniques...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003992
EISBN: 978-1-62708-185-6
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001256
EISBN: 978-1-62708-170-2
... plating. Additive low Analyze and adjust. Dark, nonuniform deposit at low density Low acid content of the plating solution Analyze and adjust. Plating current density too low Check and adjust current setting. Poor cleaning or inadequate activation Check parts going out of descale...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004161
EISBN: 978-1-62708-184-9
... by heavy scale buildup, the reduction in pump and valve internal clearance by scaling, and the plugging of small control lines often requires dismantling and descaling, or eventual replacement. Most corrosion and erosion-related failures are complicated by scale formation. Wet Bottom Ash Systems Hot...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004035
EISBN: 978-1-62708-185-6
... mm (0.063 in., or 1 16 in.) of the finished surface or to within one-half of the finish stock allowance, whichever is smaller. In general, surface tolerances apply after cleaning and descaling. Allowance for metal loss by cleaning and descaling is made by the forging producer when...