Regulations and care
Treatment of cooling water
A4.05.09.01
M20-M601C
en / 20.01.2000 BA000202 2/3
Ĺ
1.2 Chemical corrosion inhibitors
The chemical corrosion inhibitors have some advantages over the anti-corrosion oils e. g. no
danger of sludge formation due to breaking down of the emulsion and are simplier to prepare
and control.
Attention:
It is important to avoid too low concentration, because this may result in crevice corrosion!
As far as we know, the following materials are being used in MaK Diesel engines at the moment:
ĭSafety note!
Chromates are not recommended despite of their good properties due to their
poisonous nature!
Using and checking procedures must be obtained from the manufacturers, taking particular
care not to use any poisonous substance it fresh water plants are connected into the cooling
circuit.
Note:
A chemical anticorrosive agent is added to the delivery scope (fittings) of some stationary
engines. In any case, a filling with this chemical is to be implemented prior to
commisioning.
Manufacturer Additive Limit value of
nitrite content as
NO
2
in mg /l
Bedia Bedia Liquid BL1 1200 - 1500
Rohm + Haas Dia-Prosim RD 11 1400 - 2100
Ashland DEWT-NC (Schiff) 1500 - 2250
(Drew Ameroid) CWT-110 (Land)
Maxigard 800 - 1100
Liqui dewt 500 - 700
Maritech Marisol CW 1000 - 2000
Nalfleet 9-108 750 - 1000
9-111 750 - 1000
Nalcool 2000 750 - 1000
Unitor Dieselguard NB 1500 - 2500
Rocor NB Liquid 1500 - 2500
Vecom CWT Diesel / QC2 (D99) 1500 - 2500
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