2 function of the stick electrode coating, Stick electrodes according to din 1913 – Metabo Welding Transformers and Rectifiers SB 160 C User Manual
Page 5
3.1.2 Function of the Stick Electrode Coating
Stabilization of the
arc and lonization
of the arc space
Protection of the weld
metal from atmospheric
oxygen and nitrogen
This protection is achieved by the generation of shielding gases and slag during the
melting of the electrode.
Compensation of alloy burn-off.
bare
electrode
unstable
arc
coated
electrode
stable
arc
coated
electrode
slag
shielding gas
bare
electrode
Coating thickness
Penetration depth
Weld seam appearance
Gap bridging ability
Material transfer
D
d
D
D
d
d
light
D = 1.2 · d
=
heavy
D > 1.55 · d
medium
D > 1.2 · d
but < 1.55 · d
Stick Electrodes According to DIN 1913
A
acid coated
R
rutile light and medium coating
RR
rutile heavy coating
AR
rutile acid coating
C
cellulose coating
R(C)
rutile cellulose medium coating
RR(C)
rutile cellulose heavy coating
B
basic coating
B(R)
basic coating with non-basic proportions
RR(B)
rutile basic heavy coating
Types of Coating
15