Factors controlling pitting of stainless steels under wet deposits in splash zones in chlorine dioxide bleaching

Tero Hakkarainen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Oxidizing power of chlorine dioxide: In some preliminary tests, different methods of adding chlorine dioxide to the "deposit" were tested, Fig. 2. In the case of Curve A, 2 mL of chlorine dioxide solution (7 g/L) were added onto the wet pulp deposit at the start of the experiment (27 min), and 1 ml of the same solution was added at a later stage (110 min). In cases B (single dose) and C (continuous flow), a similar chlorine dioxide solution was added only into the beaker and not onto the pulp deposit. On the basis of these results, continuous pumping of chlorine dioxide solution was chosen for the experiments.

The test results for steel S31726 at 70 [Symbol Not Transcribed]C are summarized in Fig. 5, and those for steel S31254 at 70 [Symbol Not Transcribed]C and 85 [Symbol Not Transcribed]C in Fig. 6. The accumulation of chloride ions during the tests was estimated as described above. For tests where no indication of pitting was observed within the first hour or so, an open triangle denotes the composition of the solution when the potential has reached the value of 700 mV. The start of eventual pitting is denoted by filled "diamonds", and the end of tests without pitting by open squares. Trend lines for the lowest chloride content.
Original languageEnglish
Pages (from-to)55-58
Number of pages4
JournalPulp and Paper Canada
Volume100
Issue number4
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

Fingerprint

Stainless Steel
Bleaching
Pitting
Chlorine
Deposits
Stainless steel
Steel
Pulp
Chlorides
Diamond
Diamonds
Experiments
chlorine dioxide
Factors
Ions
Symbol
Chemical analysis
Experiment

Cite this

@article{95b34994b9074034a19a3176f229489c,
title = "Factors controlling pitting of stainless steels under wet deposits in splash zones in chlorine dioxide bleaching",
abstract = "Oxidizing power of chlorine dioxide: In some preliminary tests, different methods of adding chlorine dioxide to the {"}deposit{"} were tested, Fig. 2. In the case of Curve A, 2 mL of chlorine dioxide solution (7 g/L) were added onto the wet pulp deposit at the start of the experiment (27 min), and 1 ml of the same solution was added at a later stage (110 min). In cases B (single dose) and C (continuous flow), a similar chlorine dioxide solution was added only into the beaker and not onto the pulp deposit. On the basis of these results, continuous pumping of chlorine dioxide solution was chosen for the experiments.The test results for steel S31726 at 70 [Symbol Not Transcribed]C are summarized in Fig. 5, and those for steel S31254 at 70 [Symbol Not Transcribed]C and 85 [Symbol Not Transcribed]C in Fig. 6. The accumulation of chloride ions during the tests was estimated as described above. For tests where no indication of pitting was observed within the first hour or so, an open triangle denotes the composition of the solution when the potential has reached the value of 700 mV. The start of eventual pitting is denoted by filled {"}diamonds{"}, and the end of tests without pitting by open squares. Trend lines for the lowest chloride content.",
author = "Tero Hakkarainen",
note = "Project code: V7SU00159",
year = "1999",
language = "English",
volume = "100",
pages = "55--58",
journal = "Pulp and Paper Canada",
issn = "0316-4004",
publisher = "Business Information Group",
number = "4",

}

Factors controlling pitting of stainless steels under wet deposits in splash zones in chlorine dioxide bleaching. / Hakkarainen, Tero.

In: Pulp and Paper Canada, Vol. 100, No. 4, 1999, p. 55-58.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Factors controlling pitting of stainless steels under wet deposits in splash zones in chlorine dioxide bleaching

AU - Hakkarainen, Tero

N1 - Project code: V7SU00159

PY - 1999

Y1 - 1999

N2 - Oxidizing power of chlorine dioxide: In some preliminary tests, different methods of adding chlorine dioxide to the "deposit" were tested, Fig. 2. In the case of Curve A, 2 mL of chlorine dioxide solution (7 g/L) were added onto the wet pulp deposit at the start of the experiment (27 min), and 1 ml of the same solution was added at a later stage (110 min). In cases B (single dose) and C (continuous flow), a similar chlorine dioxide solution was added only into the beaker and not onto the pulp deposit. On the basis of these results, continuous pumping of chlorine dioxide solution was chosen for the experiments.The test results for steel S31726 at 70 [Symbol Not Transcribed]C are summarized in Fig. 5, and those for steel S31254 at 70 [Symbol Not Transcribed]C and 85 [Symbol Not Transcribed]C in Fig. 6. The accumulation of chloride ions during the tests was estimated as described above. For tests where no indication of pitting was observed within the first hour or so, an open triangle denotes the composition of the solution when the potential has reached the value of 700 mV. The start of eventual pitting is denoted by filled "diamonds", and the end of tests without pitting by open squares. Trend lines for the lowest chloride content.

AB - Oxidizing power of chlorine dioxide: In some preliminary tests, different methods of adding chlorine dioxide to the "deposit" were tested, Fig. 2. In the case of Curve A, 2 mL of chlorine dioxide solution (7 g/L) were added onto the wet pulp deposit at the start of the experiment (27 min), and 1 ml of the same solution was added at a later stage (110 min). In cases B (single dose) and C (continuous flow), a similar chlorine dioxide solution was added only into the beaker and not onto the pulp deposit. On the basis of these results, continuous pumping of chlorine dioxide solution was chosen for the experiments.The test results for steel S31726 at 70 [Symbol Not Transcribed]C are summarized in Fig. 5, and those for steel S31254 at 70 [Symbol Not Transcribed]C and 85 [Symbol Not Transcribed]C in Fig. 6. The accumulation of chloride ions during the tests was estimated as described above. For tests where no indication of pitting was observed within the first hour or so, an open triangle denotes the composition of the solution when the potential has reached the value of 700 mV. The start of eventual pitting is denoted by filled "diamonds", and the end of tests without pitting by open squares. Trend lines for the lowest chloride content.

M3 - Article

VL - 100

SP - 55

EP - 58

JO - Pulp and Paper Canada

JF - Pulp and Paper Canada

SN - 0316-4004

IS - 4

ER -