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Agent for light metal


Pre-paint treatment for aluminum alloys and magnesium alloys
(painting base treatment)



Non-Cr treatment for Aluminium alloy

1.Process


Degreasing
Water rinse
Pickling
Water rinse
Chemical conversion coating
Water rinse
DI water rinse
Dry

2.Production


Process Degreasing Pickling Chemical conversion coating
Product name Grandacleaner 2050E Torioner 1750 Grander AL-540S
Caracteristic Etching type non-F type non-Cr type
Temperture 40~50℃ 30~50℃ 40~50℃

3.Coating performance example


Painting Solvent(clear)35-50㎛ powder coat 
80~120㎛
Test item CASS
(96hr)
Humidity test
(240hr)
CASS
(96hr)
Humidity test
(240hr)
Test result 1.5mm 1mmcross cut  100/100 0.5mm 2mmcross cut  100/100

Trivalent Cr treatment for Aluminium alloy

1.Process


Degreasing
Water rinse
Pickling
Water rinse
Chemical conversion coating
Water rinse
DI water rinse
Dry

2.Production


Process Degreasing Pickling Chemical conversion coating
Product name Grandacleaner 2050T Torioner 1750 Grander AL-590S
Caracteristic Soft-etching type non-F type Trivalent Cr type
Temperture 40~50℃ 30~50℃ 40~50℃

3.Coating performance example


Painting powder coat 
80~120㎛
Test item SST
(1200hr)
CASS
(240hr)
Humidity test
(240hr)
Test result 0.5mm 1.5mm 2mmcross cut
100/100

※TP:AC4C(A356)
SST: After salt spray test, blister along cross cut(mm)
CASS:After CASS test blister along crosscut(mm)
Humidity test:50℃ over95%RH and cross cut adhesion


Cr free treatment system for Mg alloy

The chromium-free chemical conversion coating for magnesium alloy

Our effort Alloy type
1997
The first chem. conversion treatment line using our products for magnesium alloy started operation.
AZ91
1999 The first low electric resistance chem. conversion treatment line using our products in japan started operation.  AZ91
2003
The world’s first low electric resistance chem. Conversion treatment line using our products for pressed magnesium alloy parts started operation.
AZ31
2007
Mass production of the magnesium alloy motorcycle frame in the chemical conversion treatment line using our products started.
AM60
2012
Mass production of the ultra light weight Mg-Li alloy parts in the chemical conversion treatment line using our products started.
LA141, LZ91
2016
Mass production of magnesium alloy metallic luster appearance paddle shift started operation. 
AZ91
2017
The blackness treatment process has been established.
AZ91

1.Process


Degreasing
Water rinse
Water rinse
Surface conditioning
1
(etching)
Water rinse
Water rinse
Surface conditioning
2
(desmat)
Hot water rinse
Hot water rinse
Water rinse
Chemical conversion coating
Water rinse
Water rinse
DI water rinse

High performance treatment line up

GC:Grandacleaner 
GF:Grandafiner 
GR:Grander

3.Technical Data


Electric resistance measuring device:
Mitsubishi Chemical Analytech resistivity meter Loresta

Primary adhesion:
Cross cut adhesion test(cross cut tape peel test)

Humidity test:
Cross cut test(cross cut tape peel test)after 50℃, over95%RH and 100Hrs

Boiling water resistance:
Cross cut test(cross cut tape peel test)after in boiling water 1hour

Salt spray test:
Coating blistering width along cross cut.


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