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Continuous digester rapid thinning, TAPPI Journal June 2024

ABSTRACT: Carbon steel continuous digesters built after the early 1980s are fully stress relieved, so stress corrosion cracking has been less of a concern. However, these newer digesters were designed to run modified cooking processes that have turned out to be much more corrosive than those running with conventional cooking. This corrosion is mainly associated with softwood digesters and appears to be flow related. Average corrosion rates of 40 mil/year are possible on the exposed shell between the wash and extraction screens. The corrosion patterns are visually distinct from surfaces in the upper digester and below the wash screens. This paper goes into practical detail on where it occurs, the causes, visual identification, inspection planning and results evaluation, and finally, how to mitigate this damage, which consists of applying a corrosion resistant barrier. Some discussion on dealing with general corrosion throughout the digester is included.

Journal articles
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Interesting Developments in the Dissolving Pulp Market, Pap

Interesting Developments in the Dissolving Pulp Market, Paper360º November/December 2016

Journal articles
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To Canfor, Pulp is Much More than a Commodity, Paper360º September/October 2019

To Canfor, Pulp is Much More than a Commodity, Paper360º September/October 2019

Journal articles
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Walter Schalka: RISI’s Four-time Latin American CEO of the Year, Paper360º September/October

Walter Schalka: RISI’s Four-time Latin American CEO of the Year, Paper360º September/October

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Open Access
Lignin value prior to pulping (LVPP): An advanced pulping c

Lignin value prior to pulping (LVPP): An advanced pulping concept, TAPPI JOURNAL October 2017

Journal articles
Magazine articles
Open Access
Degradation of 2,4-dichlorophenol by melamine amine cellulos

Degradation of 2,4-dichlorophenol by melamine amine cellulose- immobilized lacasses, TAPPI JOURNAL October 2017

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Magazine articles
Open Access
Pulping and bleaching of Malaysian oil palm empty fruit bunc

Pulping and bleaching of Malaysian oil palm empty fruit bunches, TAPPI JOURNAL June 2017

Journal articles
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Paper Chemistry: What’s New, What’s Next, Paper360º March/

Paper Chemistry: What’s New, What’s Next, Paper360º March/April 2017

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Facing the Market, Paper360 May/June 2019

Facing the Market, Paper360 May/June 2019

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The Shortest Route to Fiber Quality, Paper360 May/June 2019

The Shortest Route to Fiber Quality, Paper360 May/June 2019

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