2. Wim Brandsema
Managing Director, Owner of Indufinish
25 years of experience HDG
Board member branch organization
3. Short story of company
We are an innovative full service-oriented manufacturer in
the surface treatment industry, with a unique combination
of market knowledge Galvanizing, Powder Coating,
Anodizing, Electroplating and E-coat.
Based on 25 years knowledge and experience, we provide
quality, sustainable solutions, cost effective technical and
logistical solutions and lean processes.
5. Facts
Grounded in 1991
Owned by Wim Brandsema & Han Kleijn
40 full time employees
Company surface 7.500 m²
R&D budget 2-3% of annual turn-over
Installations throughout Europe.
7. Powered by Dutch technology
Intelligence, Dynamic, Driven
Passionate about their company and products
Development power
40 ambitious people to improve constantly
24. Flux parameters temperature
Important but not influenced by flux treatment
Minor drop during proces in external unit
Heater can be installed in unit
Drying is very important!
Reduces splatter
25. Flux parameters concentration
Concentration in between 200-550 g/l total salt
Although lower concentrations are mentioned
Ratio
Mono, double, triple, quadra salts
Influenced by flux treatment
NH4OH pH correction will influence ratio and density
Correction with ZnCl2 is necessary
Possible through ZnCl2 solution or stripping acid!
26. Flux parameters pH
The “least” discussed parameter
What is your pH?
4,5
Why pH 4,5?
Because we’ve done so for ages
Less agressive/active flux
less Fe built up
What are the benefits of pH 2,3?
More active flux
Will “polish” the surface
Fe building is not an issue with a flux treatment
Better circumstances in the flux treatment
Dry filter cake, faster reaction, no Zn oxidation
27. Fe content
Drag in of Fe gives higher dross and ash production
Iron content < 5 g/l is recommendable
Hard to achieve without flux treatment
Main reason to start with flux treatment!
Concentrations < 1 g/l are achievable
Amount of rinses between pickle and flux
can be 1 or even none
Oxidation with hydrogen peroxide is most
common
28. Surface tension
Important for an equally fluxed surface
Modern wetting agents are stable towards H2O2
Automated dosing of wetting agent in small
amounts is recommendable and can be performed
in the flux treatment
29. Quality improvement
1. Case 1, proto type
Dutch general galvanizer
7 metres
2. Case 2, crash barriers, extremely high Fe content
German crash barrier galvanizer
13 metres
3. Case 3, advantages low pH
German general galvanizer
15 metres
30. Quality improvement, case 1
Prototype Fluxcleaner
Dutch general galvanizer
15.000 tons/year capacity
30 m3 flux
pH at start 3,9
Fe content 19 g/l
Colour at start coffee brown
Start up at October 27th 2007, no cure no pay
Started with iron removal at 1 g/l program
Stable situation from february 2008
different programs (removal rate)
changed pump
31. Quality improvement, case 1
Status April 2008
pH 2-3
Color coffee brown
Iron content < 5 g/l
Filter press is emptied once a week
Customer purchased unit
Savings
30 m3 new flux
Disposal of 30 m3 old flux
Disposal sludge from flux tank
Overall impression of better quality
32. Quality improvement, case 2
Extremely high Fe content
German crash barrier galvanizer
25.000 tons/year capacity
48 m3 flux
pH at start < 0,5
Fe content 78 g/l
Color at start pitch black
Start up February 2009
Corrected pH to > 1
Started iron removal at 5 g/l program
Filter press is emptied multiple times a week
33. Quality improvement, case 2
Status June 2009
pH 2,3
Fe content < 1 g/l
Color coffee brown
Savings
48 m3 of new flux
Disposal of 48 m3 heavily contaminated flux
Disposal of sludge from flux tank
Lower dross production (from 0,35% to 0,24%)
Lower ash production (from 0,54% to 0,48%)
34. Quality improvement, case 3
Advantages low pH
German general galvanizer
35.000 tons/year capacity
92 m3 flux
pH at start 4,5
Fe content 1,3 g/l
Color coffee brown
Test to see if the expected advantages of pH
found in praxis
Test for 7 months using identical, numbered
products
2,3 are
35. Quality improvement, case 3
Test followed the following steps;
Filtration at pH 4,5
Iron removal at pH 4,5
Lowering pH to 2,3 combined
with iron removal
months of testing to ensure quality
5
Conclusions
Distinguished quality improvement after
mas)
Less pickle and roughness
Less ashes, different type of ashes
improvement is stable
lowering pH (over X-
36. Quality improvement, case 3
As iron was already low specific attention was
given to dross production.
A higher dross production
related to lower pH was not found.
Higher dross production was identified and
originating from change of
products
Conclusion in a, by the galvanizer written, report was that
a lower pH gives a
considerable quality improvement but
can’t be
achieved without a
Fluxcleaner
37. Quality improvement, case 3
Status June 2013
pH 2,3
Fe content < 0,5 g/l
Colour coffee brown
Customer purchased the unit
Savings
Slightly cheaper then sludge removal from the
The improved quality meant less after work,
the savings on this labour were not calculated
estimated to be at least one FTE!
tank
but
39. Indufinish proposition
Compact
Lowest chemistry consumption
Usage of basic chemistry only
Corrosion resistance, only plastic
Will clean up existing flux with high iron content
Best ROI
Fully automated
Easy to maintain
Short delivery times
35 units in the European market
Knowhow and experience with the unit since 2006
