Document RJedRqE6Qd0yn0QJk25dENw47

EFFECTS OF DISTILLED WATER UPON GALVANIZED BUCKETS O ctober 14, 1549 The fo llo w in g a r t i c l e s were s u b m itte d f o r o b s e r v a tio n ^ : Two g a l v a n i z e d b u c k e t s ( e a c h h a l f f u l l o f d i s t i l l e d 0) One b e a k e r (GO c c ) w i t h fibr-'ei b o a r d c o v e r upon w hich was a tta c h e d a dye o r m etal c a s tin g , To be o b s e r v e d f o r : Oxidation and e le c tro ly tic actio n between the solu tio n and m etallic surfaces; esp ecially the castings suspended above th e s o lu tio n on which is to be observed e f f e c ts 6 f any fumes w hich may a r i s e from t h e s o l u t i o n . The buckets were marked as fo llo w s: Bucket #1 (an o r d i n a r y p a i l ) Bucket #2 (an ordinary p a il w ith a metal castin g ) Attached to in te rio r ap roxim ately th ree inches o f above s o l u t i o n . The b e a k e r ( w i t h c o v e r 1 was marked " b e a k e r '* and a l l o b s e r v a t i o n s o f same a r e under that heading. O c to b e r 14, 1941 F i r s t Day o f O b se rv a tio n Bucket D efin ite w ater lin e . Patches o f w hite, powdery substance ap p earin g on e n t i r e dry su rfa c e above w ater l i n e . Shreds of fib e r board appear to be dropping upon surface from cover board. Liquid is f la t to ta s te . Bucket #2 (w ith metal d ie attach ed ) D efinite water lin e observed. Patch of white m etallic substance forming around casting. This patch is approximately two in c h e s i n d ia m e te r and i s e x te n d in g down to w ard t h e s u r f a c e o f s o l u t i o n a s a t a p e r i n g s t r e a k . T his may be due t o th e solder which holds the d ie to the can. Liquid is f l a t to taste. Beaker No v i s i b l e e f f e c t s upcn c a s t i n g a t t a c h e d to b o a r d HE 0022676 2 c O ctober 15, 1941 Samples o f each, c o n ta in e r were te s t e d as fo llo w s: , L -'* -' * J fy ;''j Beaker: negative upon ad d itio n of phenolthalien Bucket #1: negative uron ad d itio n of phenolthalien Bucket #2: negative upon ad d itio n of p h en o lth alien O c to b e r 1.6 1941 B ucket #1 Increased w hite patches above water lin e . These patches a re becoming more p ro fu se ; becoming d u sty to to u ch . Area around three quarters of dry surface is mottled w ith these patches. E ntire area covered by water is coated w ith a d e f i n i t e w h ite ch e m ic a l d e p o s i t . The s i d e s o f t h e b u c k e t soacovered appear s tr ia te d w ith innumerable h a ir lin e s which vary from o ne-eighth inch to o n e-fo u rth inch a p a rt. These lin e s extend to bottom of bucket. Bucket #2 Has accum ulation o f w hite d e p o s it around c a s tin g ; t h i s c e x te n d s,d o w n two in c h e s to w ard s u r f a c e o f w a t e r . IJjTo discernible increase in size since la st observation) Beaker No v i s i b l e change i n w a t e r on s t a t u s o f c a s t i n g . pH r e a d i n g s a r e a s f o l l o w s : B e a k e r pH 5 .6 8 B u ck et #1 pH 6 .0 2 B ucket #2 pH 6-86 October 18.194) r- ' B ucket #1 M ottled p a tc h e d o f w hite substance rubbing o ff more a t touch. E n tire a re a covered by 'water has accum ulation of d ep o sit shielding a ll m etallic surface. Bucket #2 M o ttled p atch es on dry p o rtio n o f bucket n o t so p ro fu se as in Bucket #1. The p a t c h e s , n e v e r t h e l e s s , a re d u sty to to u ch . Metal c a s tin g y ie ld s no obvious in c re a s e o f d e p o s it on or C around c a s tin g . Area s t i l l approxim ately two inches in d iam eter. Beaker Kf 002267 3 O c to b e r . 20 , 194-1 pH r e a d i n g s o f sam ples w ere as f o l l o w s : Bucket, pi pH 6.11 ' Bucket y2 pH 6 .6 6 Beaker pH 6->8 ,, The tem p eratu re a t th e s e re a d in g s was tw enty d e g ree s c e n tig ra d e O c to b e r 5 1941 No v i s i b l e change upon any o f t h e b u c k e t s o t h e r th a n t h o s e previously noted. ^ 0022678