PRODUCT DESCRIPTION
BONDERITE® M-CR NR-6207 RT provides the following product
characteristics:
Technology
Product Type
Application
Metal pretreatment
Chromating
Chromating of Aluminium
BONDERITE® M-CR NR-6207 RT is a liquid Chromium-VI-free
pretreatment designed for use on aluminium and its alloys.
BONDERITE® M-CR NR-6207 RT coatings show good corrosion
resistance and paint bonding characteristics.
Application areas
For food grade applications with organic coating systems
pasteurising and sterilising tests give good results. In connection
with these tests, very good feathering-test results with AlMg5 alloys
can be achieved. Since only fresh solution is used, there are no bath
control or replenishment operations. When using BONDERITE® M
CR NR-6207 RT, a rollcoater or chemcoater is necessary. No final
rinse is required after conversion treatment.
TECHNICAL DATA
Density (20°C), g/mL
pH (1 % solution)
Chrom(III)-content, mL 0.1 Na2S2O3
(5 mL sample, 25 Vol.% solution)
DIRECTIONS FOR USE
1.07 to 1.11
2.7
~23.7
Preliminary statement:
Prior to use it is necessary to read the Material Safety Data Sheet
for
information about precautionary measures and safety
recommendations. Also, for chemical products exempt from
compulsory labeling, the relevant precautions should always be
observed. Please also refer to the local safety instructions and
contact Henkel for analytical support.
Application
The concentration depends on the wet-film thickness and the
desired coating weight:
BONDERITE® M-CR NR-6207 RT
5 to 50 Vol. %
Coating Weights:
20 to 50 mg/m2 Cr
At a wet film of 6 ml/m2 a concentration of 12.5 Vol.%
results in a coating weight of 25 mg/m2 Cr.
Process description:
1. Cleaning
2. Hot water rinsing
3. Drying
4. BONDERITE® M-CR NR-6207 RT
5. Oven drying
1
. Cleaning:
All metal must be free of grease, oil, rust, scale and other foreign
matter before the coating solution is applied. A complete line of
BONDERITE cleaners is available. Details for the proper one can be
taken from the technical data sheets.
2
. Hot water rinsing:
After cleaning, the parts are thoroughly rinsed with hot water. The
overflow rate should be high enough to keep the rinse clean and free
from scim and contamination.
3
. Drying:
The strip must be dry prior to application of the treatment solution.
4. BONDERITE® M-CR NR-6207 RT
The coating solution is applied at temperatures from 20 to 25°C, in a
uniform film to the properly cleaned strip. The coated strip
be rinsed.
5
should not
. Oven drying:
The treated strip is passed through a dry-off oven. The Peak Metal
temperature (PMT) has to be at least 65°C. Best results are
observed with a PMT of 100°C. Humidity in the oven should be
<20%.
Equipment:
The holding tank, pump, piping and solution trays should be
constructed of stainless steel.
The holding tank and piping may be constructed of, or lined with
plastic (PVC etc.).
The applicator rolls should be constructed of polyurethane or
Hypalon, shore hardness 50 to 70.
The pick-up rolls should be engraved and chromium plated.
Caution:
BONDERITE® M-CR NR-6207 RT contains chromium-III-fluoride
<10% and phosphoric acid <10% in solution.
Classification:
Please refer to the corresponding Material Safety Data Sheets for
details on:
Hazards identification
Transport information
Regulatory information
Storage:
15 to 30
TDS BONDERITE® M-CR NR-6207 RT, March 2024
Recommended storage temperature, °C
Shelf-life (in unopened original packaging),
months
Disclaimer
The information provided in this Technical data sheet (TDS) including
the recommendations for use and application of the product are
based on our knowledge and experience of the product as at the
date of this TDS. The product can have a variety of different
applications as well as differing application and working conditions in
your environment that are beyond our control. Henkel is, therefore,
not liable for the suitability of our product for the production
processes and conditions in respect of which you use them, as well
as the intended applications and results. We strongly recommend
that you carry out your own prior trials to confirm such suitability of
our product. Any liability in respect of the information in the Technical
data sheet or any other written or oral recommendation(s) regarding
the concerned product is excluded, except if otherwise explicitly
agreed and except in relation to death or personal injury caused by
our negligence and any liability under any applicable mandatory
product liability law.
In case products are delivered by Henkel Belgium NV, Henkel
Electronic Materials NV, Henkel Nederland BV, Henkel
Technologies France SAS and Henkel France SA please
additionally note the following:
In case Henkel would be nevertheless held liable, on whatever legal
ground, Henkel’s liability will in no event exceed the amount of the
concerned delivery.
In case products are delivered by Henkel Colombiana, S.A.S.
the following disclaimer is applicable:
The information provided in this Technical Data Sheet (TDS)
including the recommendations for use and application of the
product are based on our knowledge and experience of the product
as at the date of this TDS. Henkel is, therefore, not liable for the
suitability of our product for the production processes and conditions
in respect of which you use them, as well as the intended
applications and results. We strongly recommend that you carry out
your own prior trials to confirm such suitability of our product.Any
liability in respect of the information in the Technical Data Sheet or
any other written or oral recommendation(s) regarding the concerned
product is excluded, except if otherwise explicitly agreed and except
in relation to death or personal injury caused by our negligence and
any liability under any applicable mandatory product liability law.
In case products are delivered by Henkel Corporation, or Henkel
Canada Corporation, the following disclaimer is applicable:
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The data contained herein are furnished for information only and are
believed to be reliable. We cannot assume responsibility for the
results obtained by others over whose methods we have no control.
It is the user's responsibility to determine suitability for the user's
purpose of any production methods mentioned herein and to adopt
such precautions as may be advisable for the protection of property
and of persons against any hazards that may be involved in the
handling and use thereof. In light of the foregoing, Henkel
Corporation specifically disclaims all warranties expressed or
implied, including warranties of merchantability or fitness for a
particular purpose, arising from sale or use of Henkel
Corporation’s products. Henkel Corporation specifically
disclaims any liability for consequential or incidental damages
of any kind, including lost profits. The discussion herein of
various processes or compositions is not to be interpreted as
representation that they are free from domination of patents owned
by others or as a license under any Henkel Corporation patents that
may cover such processes or compositions. We recommend that
each prospective user test his proposed application before repetitive
use, using this data as a guide. This product may be covered by one
or more United States or foreign patents or patent applications.
Trademark usage
Except as otherwise noted, all trademarks in this document are
trademarks of Henkel Corporation in the U.S. and elsewhere. ®
denotes a trademark registered in the U.S. Patent and Trademark
Office.
Reference 2