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What are the most corrosive chemicals while carried at sea

Acids, anhydrides and alkalis are among the most commonly carried corrosive substances. They can rapidly destroy human tissue and cause irreparable damage. They can also corrode normal ship construction materials, and create a safety hazard for a ship. Acids in particular react with most metals, evolving hydrogen gas which is highly flammable. The IMO Codes address this, and care should be taken to ensure that unsuitable materials are not included in the cargo system. Personnel likely to be exposed to these products should wear suitable personal protective equipment



Related info

Chemical tanker familiarization training for newly joined crew member
It is essential on chemical tankers that everyone knows his ship's safety precautions thoroughly. Also the master/chief officer must assume responsibility for this. Newly signed on members of the crew should be familiarized about the following items and be shown around the ship to get detailed knowledge:

IMO codes guideline for modern chemical tankers
The IMO Codes address the safety of everyone involved and protection of the environment by ensuring that the ship will remain afloat after an assumed extent of damage, thereby minimising potential pollution and the uncontrolled release of cargo that could follow if a ship sank.

What is reactivity of noxious liquid chemicals while carrying at sea ?
The most common form of self-reaction is polymerisation. Polymerisation generally results in the conversion of gases or liquids into viscous liquids or solids. It may be a slow, natural process which only degrades the product without posing any safety hazards to the ship or the crew, or it may be a rapid, exothermic reaction evolving large amounts of heat and gases.

What is putrefaction process of liquid chemicals ?
Most animal and vegetable oils undergo decomposition over time, a natural process known as putrefaction (going off), that generates obnoxious and toxic vapours and depletes the oxygen in the tank. Tanks that have contained such products must be carefully ventilated and the atmosphere tested prior to tank entry .

Physical properties of various noxious liquid chemicals carried at sea
Specific Gravity (Density) ,Flash Point,Auto Ignition Temperature,Flammable / Explosive Limits,Vapour pressure/Boiling point,Freezing point/Melting Point....

Following detail pages explain all liquid chemical hazards & precautionary measures while carrying at sea.

  1. Accumulation of electrostatic field, charge relaxation and surface voltage inside a ships tank


  2. Toxicology and associated hazards onboard chemical tankers


  3. Hazards of vapour given off by a flammable liquid while carrying at sea


  4. Reactivity of various noxious liquid chemicals


  5. Most corrosive chemicals carried onboard chemical tankers


  6. Posoning hazards & first aid treatment


  7. What is putrefaction process of liquid chemicals ?


  8. Specific gravity,Vapour pressure and boiling point,Electrostatic charging & measuring Viscosity
  9. General precautions onboard chemical tankers


  10. Mooring precautions onboard chemical tankers


  11. Berth precautions onboard chemical tankers


  12. Cold weather countermeasures, avoiding electric storms


  13. Restriction on using radio equipments and other mobile devices in cargo working areas


  14. Handling precautions for carcinogens or cyanide-like substances


  15. Handling precautions for Benzene & Methanol


  16. Securing cargo tank lids and required safety precautions


  17. Means of access (gangways or accommodation ladders) safety precautions


  18. Preparations for hot work and safety precautions


  19. Safe method of gas freeing after a tank cleaning onboard chemical tankers


  20. Precautions against static electricity


  21. Handling precautions for nitrogen from shore station


  22. Cargo tank entry safety precautions


  23. Ship to ship transfer safety precautions


  24. How to deal with chemical fire onboard ?





Following reference publications provide useful guidance and international regulations for carrying hazardous chemicals at sea.



Our detail pages contain somewhat larger lists of resources where you may find more useful information.


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