CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...

Type
316
Concen- Temperature HASTEllOY~ alloy Staintration.
less
Corrosive Media percent deg. F deg. C 8/8-2 C/C-276 G/G-3 Steel Conditions
Sodium Chloride - 255 124 - E - - saturated brine (NaCI). containing 10% NaCI in suspension and 20 gil
CaSO]. pH 6.5
Brine purification - salt production
Aeration - 1.5 ppm O~
Agitation - 6 ft./sec.
Total days - 33
Sodium Chloride - 258·260 126·127 - E - - saturated brine (NaC!), aeration
Sodium Chloride - 265 129 - E E - saturated with 5·15% suspended NaCI solids plus some suspended
CaS04, pH 7.5·8.0, moderate aeration
Sodium Chloride - 265 129 - E - - saturated sodium chloride solution with 5·15% suspended NaCI solids
plus some suspended CaS04, pH 7.5·8.0, moderate aeration
Sodium Chloride - 522 272 - E - - in rotary kiln drier. Alloy C=0.2 mpy
Sodium Chlorite 10 75 24 - S - -
Sodium Dialkyl - 41·96 5·36 - E - - in oxidation reactor during production of tetra alkyl thiuram disulfide,
Orthocarbonate liquid phase plus NaNO], HCI, NaCI, HNO~. Alloy C=0.02 mpy
Sodium Ferricyanide 10 75 24 S - - -
Sodium Flormaldehyde 25·60 176 80 E E - - in preconcentrator, Alloy C=0.006 mpy
Sulfoxylate Liquor
Sodium Fluoride 10 75 24 S - - -
Sodium Fluosilicate - 80·110 27-43 G - - - 96 percent air, 3 percent H~O, 0.06 percent HCI, sodium fluosilicate in
Dust
rotary drier
Sodium Fluosilicate - 130 54 - E - - in reaction tank with turbine agitator. Alloy C= 1.6 mpy
Slurry
Sodium Glutamate, Mono - 68·140 20·60 E - - - saturated with NaCI at pH of 5.0·6.4
Sodium Glutamate, Mono - 75 24 E - - - saturated with NaCI at a pH of 5 to 6.4
Sodium Hydrosulfide 5·12 230 110 E E - - plus sodium sulfide and polysulfides as impurities in unknown amounts
Sodium Hydroxide 1.5M 323 162 - G G B oxygenated, 7 hours, extensive aeration
Pulp Digester Liquor
Sodium Hydroxide 2·3 110 43 E E - E organic intermediate aluminum salts; pyridine, water
Sodium Hydroxide 2·3 102 83 - E E E water, ethanol and other fermentation products (esters, organic acids,
fuel oil, carbon dioxide), sodium carbonate 1%, sulfur dioxide; pH nor·
mally 10 to 11. Cleaned occasionally with 4·8% acetic acid.
Sodium Hydroxide 10·15 90 32 - E E E plus NaCI and Na~CO]
Duration - 150 days
Aeration - moderate
Agitation - normal flow
Type of test - field
Process involved - reaction of HCI and COCI~ with NaOH
Sodium Hydroxide 10 Room Room - E - -
40 Room Room - E - -
Sodium Hydroxide 15 to 230 to 110 S B - - plus monochlortoluene saturated with approx. 2 percent each of HCI and
CI~. Alloy C=23 mpy
Sodium Hydroxide - 90 32 - S - - 10 to 15% NaOH, NaCI and Na~CO]. HCI, COCI~, moderate aeration
Sodium Hydroxide - 100 38 - E - - plus cresylic acid. Alloy C=0.5 mpy
Sodium Hydroxide - 160 71 - E - E dilute, chromate and chromic wastes, chlorides, all low concentrations
Sodium Hypochlorite 0.5 95 35 - E - - Dakin's solution. Alloy C=0.1 mpy
0.5 140 60 - E - -
0.5 212 100 - E - -
Sodium Hypochlorite 1 140 60 - G - - Alloy C=4.8 mpy
Sodium Hypochlorite 1·2 70 21 - E - E plus unidentified components. pH near 7
Sodium Hypochlorite 5 65 18 - E - - bottom of bleach make·up tank. Alloy C