Go Down

Topic: if i accidentally drop my arduino on water.... (Read 974 times) previous topic - next topic


I've heard of Coca Cola being used to remove rust

I've never heard tooth enamel described as "rust"
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.


Eu não sou o teu criado. Se respondo no fórum é para ajudar todos mediante a minha disponibilidade e disposição. Responder por mensagem pessoal iria contra o propósito do fórum e por isso evito-o.
Se realmente pretendes que eu te ajude por mensagem pessoal, então podemos chegar a um acordo e contrato onde me pagas pela ajuda que eu fornecer e poderás então definir os termos de confidencialidade do meu serviço. De forma contrária toda e qualquer ajuda que eu der tem de ser visível a todos os participantes do fórum (será boa ideia, veres o significado da palavra fórum).
Nota também que eu não me responsabilizo por parvoíces escritas neste espaço pelo que se vais seguir algo dito por mim, entende que o farás por tua conta e risco.

Dito isto, mensagens pessoais só se forem pessoais, ou seja, se já interagimos de alguma forma no passado ou se me pretendes convidar para uma churrascada com cerveja (paga por ti, obviamente).


Your biggest problem won't be damage caused by water to chips and components, it'll be the damage that it causes to all the pin connectors if any water is left inside them.

If the water was of the "fresh" variety then drying off as quickly as possible using a strong blower (hair drier on "cold") should give good results.  If you use a warm or hot hair drier make sure you do not get too close or you'll cook the components.  Do NOT bake in an oven or a  microwave.  Oven thermostats are pretty useless and you may end up overheating the plastics.  Microwaves just love to eat metal components.

If the water was "salty" or dirty then flush extensively in fresh running water to remove all salt and contaminants then dry as above.

If you have deionised or distilled water available, a flush in that before drying would be beneficial.

If the circuit was left wet and the component wires start to show signs of going green then kiss it goodbye - you are too late.

A squirt with some dewatering fluid such as WD40 might help after the event but you will end up with a sticky circuit board.  I suppose you could then flush that off with a propriety degreaser.


A squirt with some dewatering fluid such as WD40 might help after the event but you will end up with a sticky circuit board. 

While I'm always keen to promote WD-40 as a way to help the local San Diego economy, I learned long ago it's a bad choice for complex PCBs, especially those with socketed parts. Over time the connections get poor.

The best and SAFEST way to dispel water from a small electrical device is to put it in a bowl of new, clean, dry white rice. After a day the rice will have absorbed all of the moisture. The same technique "fixes" cell phones dropped into the sink, but won't remove the red mark from the moisture label!


Ah the rice trick is useful to know.

One problem is enclosed components like relays - they fill with water and can't be dried properly.  On the Uno I'd reckon the connectors and the push-button are the most problematic - a blast with compressed air can might help dislodge moisture from within these.

And yes if its salt water you need to wash off the salt in fresh water ASAP before drying
[ I won't respond to messages, use the forum please ]

Go Up