很多业主逛完市场更懵：商家A说“铁艺结实、便宜、焊死了贼稳”，商家B说“铝艺不生锈、免维护、用二十年还新”。两边都没说谎，只是他们没告诉你——这两种材料根本不是同一个赛道。

Many homeowners are even more confused after visiting the market: Merchant A says, 'Iron is sturdy, cheap, and can be welded to ensure stability,' while Merchant B says, 'Aluminum does not rust, is maintenance free, and can be used for 20 years to make it new.'. Neither side lied, they just didn't tell you - these two materials are not even on the same track.

先看本质差别：

Let's first look at the essential differences:

铁艺是钢或铸铁做骨架，表面靠“热浸镀锌+喷塑”两层保护去对抗生锈。它怕的是切口、焊疤、底边积水这三处，只要防锈工艺到位，用十五到二十年没问题，撞一下也只掉漆不裂。

Ironwork is made of steel or cast iron as the skeleton, and the surface is protected against rust by two layers of "hot-dip galvanizing+spray coating". It is afraid of three areas: incisions, welding scars, and water accumulation at the bottom edge. As long as the rust prevention process is in place, it can be used for fifteen to twenty years without any problems, and even if it is bumped, the paint will only peel off without cracking.

铝艺是铝合金挤压成型，本身不锈，靠型材壁厚和烤漆撑场面。它不怕水、不怕海边盐雾，但硬度只有钢的1/3，暴力撞击会凹、会断焊。

Aluminum art is the extrusion molding of aluminum alloy, which is rust free and supported by the thickness of the profile wall and the baking paint. It is not afraid of water or salt spray by the seaside, but its hardness is only 1/3 of steel, and violent impact can cause dents and broken welds.

按场景挑，比按“哪个高级”挑靠谱：

Choosing by scene is more reliable than choosing by "which one is more advanced":

别墅院子、厂区外围、要抗撞防盗：选铁艺。竖杆壁厚≥1.2mm、横杆≥1.5mm、立柱≥2.0mm，整体热镀锌后再喷塑，小偷拿脚踹不动。

Villa yard and factory perimeter should be collision resistant and anti-theft: choose wrought iron. The wall thickness of the vertical pole is ≥ 1.2mm, the horizontal pole is ≥ 1.5mm, and the vertical pole is ≥ 2.0mm. The entire structure is hot-dip galvanized and then sprayed with plastic. Thieves cannot kick it with their feet.

阳台栏杆、楼梯扶手、沿海或常年潮湿的一楼小院：选铝艺。不用每年检查焊口有没有吐黄水，雨水直接冲也不心慌。

Balcony railings, staircase handrails, coastal or damp first floor courtyards: choose aluminum art. You don't need to check if there is any yellow water coming out of the welding joint every year, as you won't feel anxious even if it is directly washed away by rainwater.

小区围墙、临街商铺：铁艺性价比最高，但必须确认“整体热镀锌”五个字写进合同，别用冷镀锌管顶替。

Community walls and street facing shops: wrought iron has the highest cost-effectiveness, but it must be confirmed that the words "overall hot-dip galvanizing" are written into the contract and not replaced with cold galvanized pipes.

有小孩攀爬的庭院：两种都可以，但竖杆净间距必须压到110mm以内，别让娃把头钻过去，这一条比材质重要十倍。

A courtyard with children climbing: Both options are acceptable, but the clear distance between the vertical poles must be within 110mm to prevent the children from getting their heads through. This one is ten times more important than the material.

三个商家不会主动说的真相：

The truth that three merchants will not voluntarily disclose:

第一，铝艺不是“完全不用管”。烤漆层被硬物刮穿后，裸露的铝在空气中会氧化发白，虽然不锈，但斑点擦不掉，只能整根换。

Firstly, aluminum art is not completely neglected. After the paint layer is scraped through by a hard object, the exposed aluminum will oxidize and turn white in the air. Although it is rust free, the spots cannot be wiped off and can only be replaced as a whole.

第二，铁艺的“免维护”是假的。前五年确实不用管，第六年开始每年检查一次底边和焊口，补一点冷镀锌漆，能再撑十年。完全不管的那种，第八年一定从底边开始吐黄水。

Secondly, the "maintenance free" feature of wrought iron is fake. In the first five years, there was really no need to worry about it. Starting from the sixth year, the bottom edge and welds were inspected once a year, and a little cold galvanized paint was added, which can last for another ten years. The kind that doesn't matter at all, in the eighth year, it will definitely start spitting yellow water from the bottom.

第三，同尺寸同款式，铝艺单价通常比铁艺贵30%到50%。如果报价单上铝艺比铁艺还便宜，要么是壁厚缩水到0.8mm以下，要么是回收铝挤出，别贪。

Thirdly, for the same size and style, the unit price of aluminum art is usually 30% to 50% higher than that of iron art. If aluminum is cheaper than iron on the quotation, either the wall thickness is reduced to below 0.8mm, or recycled aluminum is extruded. Don't be greedy.

顺手一条验收红线：不管选哪种，装完别只站远处看整体。蹲下来看三根地方——立柱底座和地面交接处有没有打胶密封、竖杆和横杆焊接点有没有磨平补漆、最底下一根横杆离地是不是不超过10cm（防钻入）。这三处过了，这圈护栏才真算装完。

A handy red line for acceptance: No matter which one you choose, don't just stand far away and look at the whole thing after installation. Squat down and check three places - whether there is glue sealing at the junction of the column base and the ground, whether the welding points of the vertical and horizontal bars are smoothed and repainted, and whether the bottom horizontal bar is not more than 10cm above the ground (to prevent drilling in). After passing these three places, this fence is truly installed.

把“要抗撞选铁、要免锈选铝、间距110mm、底边打胶”这四句钉在订货备注里，院子围完不用每年后悔一次。

Nail the four sentences "choose iron for collision resistance, aluminum for rust free, spacing of 110mm, and glue on the bottom edge" in the order remarks, so you don't have to regret it once a year after the yard is surrounded.