阿尔法免洗无松香助焊剂NR205
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产品详细介绍
ALPHA
NR205免洗无松香助焊剂
SM 1008-2
NO-CLEAN, LOW RESIDUE FLUX
DESCRIPTION
Alpha NR205 is a halide-free, rosin/resin free, low solids,
no-clean flux. It is formulated for wave soldering of
through-hole, mixed technology and surface mount
assemblies. The flux is particularly effective when soldering
in an inert atmosphere. The flux produces a tack-free surface
with high surface insulation resistance and very little residue to
interfere with electrical testing. Alpha NR205 fully conforms
to the requirements of Bellcore TR-NWT-000078. The flux has
been specifically formulated to resist degradation in surface
insulation resistance and electromigration, even in situations
where the flux does not experience soldering
temperatures and when heavy levels of flux have been
applied. The residues are non-corrosive and do not cause
"greening" when in contact with copper or copper-bearing
alloys.
Alpha NR205 is particularly well-suited for touch-up/rework
when supplied in a flux pen. Alpha “WriteFlux” pens make
local flux application an easily controlled process.
FEATURES & BENEFITS
• High
activity
• Meets bellcore requirements & other critical sir
tests
• Very safe
residues
• Non-corrosive residues
• Good soldering in air; excellent soldering in nitrogen
for low defects
• High reliability assemblies, even when the flux does
not experience soldering temperatures
• Excellent for touch-up/rework applications
• Will not cause "greening" on exposed copper/copper
alloys
APPLICATION
Alpha NR205 flux is designed for foam, spray, and wave
applications. Topside preheat temperatures of 80-105°C
(180-220°F) are recommended. Flux solids can be monitored
using Alpha's Flux Solids Control Kit #3. If thinning is
required, the use of Alpha 493 thinner is recommended. For
applications which specify cleaning, a water cleaning step with
Alpha 2110 saponifier or Alpha Autoclean 40, after soldering, will
remove any slight traces of flux residues.
For application via the flux pen, the nib should be lightly
wiped on and around the solder joint to be reworked. Once a
suitable amount of flux has been applied the manual soldering
operation can be performed.
Technical Specifications
Appearance:
Clear,
colorless liquid
Solids Content,
wt/wt: 2.15
Specific Gravity @ 25°C
(77°F): 0.797 ± 0.002
Acid Number (mg KOH/g):
16.5
± 1.0
Halides:
NONE
Flash Point (T.C.C.):
13°C
(56°F)
Recommended Thinner:
493
IPC J-STD-004 Designation
ORL0
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