December 1947
INDUSTRIAL
AND E N G I N E E R I N G
CHEMISTRY
93 A
VALVES made of ALOYCO 20 excel in resistance to H 2 S0 4 LOYCO 20 is a well-balanced, austenitic
Aι alloy, combining good physical proper ties, ready machinability and a high degree
ALOYCO
of resistance to a wider range, of corrosive media than 18-8 and other less complex stainless steels. I t is especially effective in either hot or cold sulfuric acid. Valves made of Aloyco 20 have many useful applications in industry under severely cor rosive conditions. They are giving excep tional service to manufacturers of oil refinery products, fertilizers, plastics, rayon, soap, synthetic rubber, coal t a r products, explosives and many others. Send us your specifications.
20
IN
SULFURIC
ACID
C O R R O S I O N RATES ESTABLISHED BY 7 4 0 - H O U R L A » O R A T O R Y TESTS .07
Μ
SULltURIC WC\D, BOILING
Ai
4 a
A4
ΐ Ζ Ζ .03
< ζ
ο ο .07
ο
.01
0
!0
20
30
40
SO
tO
70
80
90
100
CONCENTRATION OF SULFURIC ACID. PERCENTAGE. BY WEIGHT
CORROSION IN BOILING ACID 0.5',ί H2SO1 - 0.0036 Ipy. 2.5 " - 0.0084 " 5 " -0.0130 " 10 " -0.0132 " 20 " -- 0.0264 " 30 " -0.0181 " 40 " - 0.0174 " 50 - 0.0276 " 60 " Not Recommended 70 " Not Recommended 80 " Not Recommended 90 " -0.0220 " 93 " -0.0110 "
CORROSION IN 80° C. (176° F.) ACID 0.5";. H2SO1 - Nil Ipy. 2.5 " Nil " 5.0 " - 0.0027 " 10 " -0.0137" 20 " ' -0.0138" 30 " - 0.0108 " 40 " -0.0105" 50 " -0.0120" 60 -0.0152" 70 " Not Recommended 80 " - 0.0220 " 90 " -0.0110" 93 " — 0.007 "
Nest of Aloyco 20 Valves used in recovery of alkylation spent acid.
The above photo shows one of several groups of Aloyco 20 Valves in t h e plant of Consolidated Chemical Corporation, Hous ton, Texas. I t is p a r t of an alkylation spent acid recovery installation made b y t h e Chemical Construction Company. This system reclaims full strength H2SO4 from 85-90 percent spent acid, a waste product of the alkylation process of producing high octane gasoline with sulfuric acid as t h e catalyst.
ALOYCO STAINLESS STEEL
VALVES AND FITTINGS GATE. GLOBE, Y, CHECK, TANK, SAMPLING A N D V-PORT VALVES SCREWED AND FLANGED FITTINGS
ALLOY STEEL PRODUCTS COMPANY, INC. 1310 WEST ELIZABETH AVE.
·
LINDEN. N. J.
