Optional :
SS-316L, Hastelloy B/C, Titanium, Monel, Nickel, Inconel, Zirconium, Tantalum, Carbon Steel etc. for different liquids corrosive to SS-316.
Note : Amar offers all the internal & optionally external wetted parts in the same material of construction as that of body & head to give complete corrosion resisting autoclaves.
Most of the above material are available for stirred, non-stirred, fabricated, glass & shaker autocalves.
General Corrosion Properties of some Metals and Alloys* Ratings
0
Unsuitable. Not available in form required or not suitable for fabrication requirements or not suitable for corrosion conditions.
1
Poor to fair
2
Fair. For mild conditions or when periodic replacement is possible. Restricted use.
3
Fair to good
4
Good. Suitable when superior alternative are uneconomical
5
Good to excellent
6
Normally excellent
Small variations in service condition may appreciably affect corrosion. Choice of material is therefore guided wherever possible by a combination of experience and laboratory and site tests.
Materials
Non-oxidizing or reducing media
Liquids
Gases
Acid solutions, excluding hydrochloric Phosphoric sulfuric (most condition many organics)
Neutral solutions, e.g. many Non-oxidizing salt solutions, chlorides, sulfates
Alkaline solutions e.g.
Oxidizing Media
Halogen and derivatives
Caustic and mild alkalies, excluding ammonium hydroxide
Ammonium hydroxide and amines
Acid solutions, e.g. nitirc
Neutral or alkaline Solutions e.g. per sulfates, peroxides, chromates
Pitting media, acid ferric chloride solutions
Halogen
Halide acids, moist, e.g. hydrochloric hydrolysis products of organic halides
AMAR gives recommendation for material selection for particular media, however it does not guarantee 100% corrosion resistance of a particular M.O.C to a particular corrosive media, as it also depends on various parameters like temperature, pressures, concentration etc. of the reactions. Reactors upto 25 ltrs. are machined from rolled / forged bar stock & reactors above 25 ltrs. are normally fabricated from plates. The material listed below may not be available in all possible sizes.
It is a nickel, chromium, molybdenum alloy that has the widest corrosion resistance & is the most widely used alloy for corrosive media & next most popular after SS316
It has excellent corrosion resistance to
»
Variety of chloride compounds & chlorine contaminated material
»
Strong oxidizing chloride solutions such as wet chlorine & hydrochloride & sodium hypochlorite solutions
It is a nickel molybdenum alloy & offers excellent corrosion resistance to solutions of Hydrochloric, Sulfuric & Phosphoric acid in all concentrations & at all temperatures in the absence of oxidizing agents.
Tantalum is practically inert to many oxidizing & reducing acids. It offers the best & most outstanding resistance to wide variety of corrosive media including hydrochloric, nitric, sulfuric & phosphoric acids. It is attacked by hot alkalis & hydrofluoric acid. The costs are prohibitive however tantalum liner or inner wetted parts of tantalum & others part of Titanium or hastelloy C can be offered. Small sizes such as 50ml - 700ml can be manufactured completely in Tantalum. The max. temp. are restricted upto 250°C only.
