Fig. 14—Rate of wetting of steel B
after pickling in 2N HpSOq for 2 hr
(2, steel positive, water drop
0
o 0
o 0
i
20
20
10
100
negative; L., steel negative, water
!
30
300
40
400
drop positive).
v2
1
12
T
o
Qg
SG
x
BE
=
+
V/t
Oo
°
—
oO
>
al
°
—
o
o
Oo
4
o
o4
0
0
\
10
L
Vv
20
30
0
Fig. 13-——Kate of wetting of steel C
o—
l
10
a
Vv
20
Fig. 16—Rate of wetting of steel B
after pickling in 12N HNO; overnight
{C, steel positive, water drop negative; LL, steel negative, water posi-
after pickling in 12N HNO; [*, steel
bling steel in sand), steel positive,
water drop negative].
steel negative, water drop positive
positive, water negative (Nov. 6,
1963); O, steel negative, water
drop positive (Nov. 7, 1963);T,
tive; A (treatment followed by tum-
Vt
(Nov. 11, 1963)).
Fig. 17—Rfate of wetting
copper by 12N HNO>.
of Sheet
30